@incollection{BockRosenthalHartmannHelmer1973,
  author    = {Bock-Rosenthal, Erika and Hartmann, Heinz and Helmer, Elvira},
  title     = {Leitende Angestellte: Loyalit{\"a}t zum Unternehmen},
  series = {Der Arbeitgeber},
  volume    = {20},
  booktitle = {Der Arbeitgeber},
  pages     = {924 -- 926},
  year      = {1973},
  language  = {de}
}
@book{BockRosenthalHartmannHelmer1973,
  author    = {Bock-Rosenthal, Erika and Hartmann, Heinz and Helmer, Elvira},
  title     = {Leitende Angestellte},
  edition   = {1. Aufl.},
  publisher = {Luchterhand},
  address   = {Neuwied [u.a.]},
  isbn      = {3-472-12132-7},
  pages     = {160 S.},
  year      = {1973},
  language  = {de}
}
@incollection{BockRosenthalHartmannHelmer1973,
  author    = {Bock-Rosenthal, Erika and Hartmann, Heinz and Helmer, Elvira},
  title     = {Eigene soziale Identit{\"a}t - Verlangen nach eigener Interessenvertretung},
  series = {Die F{\"u}hrungskraft},
  volume    = {13},
  booktitle = {Die F{\"u}hrungskraft},
  pages     = {18 -- 19},
  year      = {1973},
  language  = {de}
}
@incollection{BockRosenthalHartmannHelmer1973,
  author    = {Bock-Rosenthal, Erika and Hartmann, Heinz and Helmer, Elvira},
  title     = {Das Selbstbild der leitenden Angestellten},
  series = {Bl{\"a}tter f{\"u}r Steuerrecht, Sozialversicherung und Arbeitsrecht},
  volume    = {20},
  booktitle = {Bl{\"a}tter f{\"u}r Steuerrecht, Sozialversicherung und Arbeitsrecht},
  pages     = {305 -- 309},
  year      = {1973},
  language  = {de}
}