APA

Ferm V. T. A., . (19691956). Encyclopedia of morals. New York: Greenwood Press.

Chicago

Ferm Vergilius Ture Anselm, . 19691956. Encyclopedia of morals. New York: Greenwood Press.

Harvard

Ferm V. T. A., . (19691956). Encyclopedia of morals. New York: Greenwood Press.

MLA

Ferm Vergilius Ture Anselm, . Encyclopedia of morals. New York: Greenwood Press. 19691956.