LaTeX Forum

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\documentclass{article}

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\begin{filecontents*}{\jobname.bib}
@book{sch94aa,
   Address = {Wiesbaden},
   Author = {Schneider, Dietram and Baur, Cornelius and Hopfmann, Lienhard and Schneider-Baur-Hopfmann},
   Date-Added = {2016-12-13 11:45:53 +0000},
   Date-Modified = {2016-12-13 11:46:23 +0000},
   Keywords = {Outsourcing, Definitionen},
   Publisher = {Gabler},
   Title = {Re-Design der Wertkette durch make or buy: Konzepte und Fallstudien},
   Year = {1994}}

@article{pic92aa,
   Author = {Picot, Arnold and Maier, Matthias},
   Date-Added = {2016-12-02 12:49:26 +0000},
   Date-Modified = {2016-12-02 12:49:40 +0000},
   Journal = {Information Management},
   Keywords = {Outsourcing},
   Number = {4},
   Pages = {14--27},
   Title = {Analyse-und Gestaltungskonzepte f{\"u}r das Outsourcing},
   Year = {1992}}

@book{put13aa,
   Address = {Weinheim},
   Author = {Putnoki, Hans and Hilgers, Bodo},
   Date-Added = {2016-12-01 17:03:38 +0000},
   Date-Modified = {2016-12-02 09:10:00 +0000},
   Edition = {2., aktualisierte und erw. Aufl},
   Keywords = {Definitionen},
   Publisher = {Wiley},
   Title = {Gro{\ss}e {\"O}konomen und ihre Theorien: ein chronologischer {\"U}berblick},
   Year = {2013}}

@book{rep14aa,
   Annote = {http://link.springer.com/article/10.1007/BF03340507},
   Author = {Repschl{\"a}ger, Jonas and Pannicke, Danny and Zarnekow, R{\"u}diger},
   Date-Added = {2016-11-22 19:19:21 +0000},
   Date-Modified = {2016-12-21 08:37:49 +0000},
   Keywords = {Cloud Computing},
   Publisher = {Springer},
   Title = {Cloud Computing: Definitionen, Gesch{\"a}ftsmodelle und Entwicklungspotenziale},
   Year = {2014}}
\end{filecontents*}

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\begin{document}
   
   \cite{pic92aa,sigfridsson,worman}
   \cite{put13aa}
   \cite{rep14aa}
   \cite{sch94aa}
   
   \printbibliography[title={Literaturverzeichnis}]

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\begin{document}
	
	\cite{pic92aa}
	\cite{put13aa}
	\cite{rep14aa}
	\cite{sch94aa}
	
	\printbibliography[title={Literaturverzeichnis}]

\end{document}

@book{sch94aa,
	Address = {Wiesbaden},
	Author = {Schneider, Dietram and Baur, Cornelius and Hopfmann, Lienhard and Schneider-Baur-Hopfmann, ..},
	Date-Added = {2016-12-13 11:45:53 +0000},
	Date-Modified = {2016-12-13 11:46:23 +0000},
	Keywords = {Outsourcing, Definitionen},
	Publisher = {Gabler},
	Title = {Re-Design der Wertkette durch make or buy: Konzepte und Fallstudien},
	Year = {1994}}

@article{pic92aa,
	Author = {Picot, Arnold and Maier, Matthias},
	Date-Added = {2016-12-02 12:49:26 +0000},
	Date-Modified = {2016-12-02 12:49:40 +0000},
	Journal = {Information Management},
	Keywords = {Outsourcing},
	Number = {4},
	Pages = {14--27},
	Title = {Analyse-und Gestaltungskonzepte f{\"u}r das Outsourcing},
	Year = {1992}}

@book{put13aa,
	Address = {Weinheim},
	Author = {Putnoki, Hans and Hilgers, Bodo},
	Date-Added = {2016-12-01 17:03:38 +0000},
	Date-Modified = {2016-12-02 09:10:00 +0000},
	Edition = {2., aktualisierte und erw. Aufl},
	Keywords = {Definitionen},
	Publisher = {Wiley},
	Title = {Gro{\ss}e {\"O}konomen und ihre Theorien: ein chronologischer {\"U}berblick},
	Year = {2013}}

@book{rep14aa,
	Annote = {http://link.springer.com/article/10.1007/BF03340507},
	Author = {Repschl{\"a}ger, Jonas and Pannicke, Danny and Zarnekow, R{\"u}diger},
	Date-Added = {2016-11-22 19:19:21 +0000},
	Date-Modified = {2016-12-21 08:37:49 +0000},
	Keywords = {Cloud Computing},
	Publisher = {Springer},
	Title = {Cloud Computing: Definitionen, Gesch{\"a}ftsmodelle und Entwicklungspotenziale},
	Year = {2014}}