Não informado. (1978). Key to economic science and managerial sciences. Martinus Nijhoff.
Chicago-Zitierstil (17. Ausg.)Não informado. Key to Economic Science and Managerial Sciences. The Hague, Holanda: Martinus Nijhoff, 1978.
MLA-Zitierstil (8. Ausg.)Não informado. Key to Economic Science and Managerial Sciences. Martinus Nijhoff, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.