@incollection{BockRosenthalHartmannHelmer1973,
  author    = {Erika Bock-Rosenthal and Heinz Hartmann and Elvira Helmer},
  title     = {Leitende Angestellte: Loyalit{\"a}t zum Unternehmen},
  booktitle = {Der Arbeitgeber},
  volume    = {20},
  year      = {1973},
}