@book{LittkemannDerfussEisenbergetal.2008,
  author    = {Littkemann, J. and Derfuß, K. and Eisenberg, D. and Fietz, A. and Holtup, M. and Schulte, K. and Stockey, C.},
  title     = {{\"U}bungen zum Controlling: Aufgabenstellungen mit L{\"o}sungsskizzen zur Klausurvorbereitung},
  publisher = {BoD},
  address   = {Norderstedt},
  isbn      = {3837076113},
  year      = {2008},
  language  = {de}
}
@book{LittkemannDerfussEisenbergetal.2010,
  author    = {Littkemann, J. and Derfuß, K. and Eisenberg, D. and Fietz, A. and Holtup, M. and Schulte, K. and Stockey, C.},
  title     = {{\"U}bungen zum Controlling: Aufgabenstellungen mit L{\"o}sungsskizzen zur Klausurvorbereitung, Band 1},
  edition   = {2. Aufl.},
  publisher = {BoD},
  address   = {Norderstedt},
  isbn      = {978-3837076110},
  year      = {2010},
  language  = {de}
}
@book{LittkemannDerfussFietzetal.2010,
  author    = {Littkemann, J. and Derfuß, K. and Fietz, A. and Hahn, T. and Holtup, M. and Kratzke, A. and Reinbacher, P. and Schulte, K. and Stockey, C.},
  title     = {{\"U}bungen zum Controlling: Aufgabenstellungen mit L{\"o}sungsskizzen zur Klausurvorbereitung, Band 2},
  volume    = {2},
  publisher = {BoD},
  address   = {Norderstedt},
  isbn      = {978-3839179895},
  year      = {2010},
  language  = {de}
}
@book{LittkemannHoltupSchulte2013,
  author    = {Littkemann, J. and Holtup, M. and Schulte, K.},
  title     = {Buchf{\"u}hrung: Grundlagen - {\"U}bungen - Klausurvorbereitung},
  edition   = {6. Aufl.},
  publisher = {Springer Gabler},
  address   = {Wiesbaden},
  isbn      = {978-3-658-03512-9},
  year      = {2013},
  language  = {de}
}
@book{LittkemannDerfussFietzetal.2010,
  author    = {Littkemann, J. and Derfuß, K. and Fietz, A. and Hahn, T. and Holtup, M. and Kratzke, A. and Reinbacher, P. and Schulte, K. and Stockey, C.},
  title     = {{\"U}bungen zum Controlling: Aufgabenstellungen mit L{\"o}sungsskizzen zur Klausurvorbereitung},
  edition   = {Band 2},
  publisher = {BOD 2010},
  address   = {Norderstedt},
  isbn      = {978-3839179895},
  year      = {2010},
  language  = {de}
}
@book{LittkemannDerfussEisenbergetal.2010,
  author    = {Littkemann, J. and Derfuß, K. and Eisenberg, D. and Fietz, A. and Holtup, M. and Schulte, K. and Stockey, C.},
  title     = {{\"U}bungen zum Controlling: Aufgabenstellungen mit L{\"o}sungsskizzen zur Klausurvorbereitung},
  edition   = {2},
  address   = {Norderstedt},
  isbn      = {978-3837076110},
  year      = {2010},
  language  = {de}
}
@book{LittkemannHoltupSchulte2015,
  author    = {Littkemann, J. and Holtup, M. and Schulte, K.},
  title     = {Buchf{\"u}hrung: Grundlagen - {\"U}bungen - Klausurvorbereitung},
  edition   = {7},
  publisher = {Books on Demand},
  address   = {Norderstedt},
  isbn      = {978-3-7347-7047-0},
  year      = {2015},
  language  = {de}
}