Não informado. (1978). Current Bibliography Directory of the Arts and Sciences. Institute for Scientific Information.
Chicago-Zitierstil (17. Ausg.)Não informado. Current Bibliography Directory of the Arts and Sciences. Philadelphia, Pa: Institute for Scientific Information, 1978.
MLA-Zitierstil (8. Ausg.)Não informado. Current Bibliography Directory of the Arts and Sciences. Institute for Scientific Information, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.