@book{LittkemannHoltupSchulte2015,
  author    = {J. Littkemann and M. Holtup and K. Schulte},
  title     = {Buchf{\"u}hrung: Grundlagen - {\"U}bungen - Klausurvorbereitung},
  edition   = {7},
  isbn      = {978-3-7347-7047-0},
  year      = {2015},
}