APA (7th ed.) Zitazioa
Hospers, J. (1972). Human conduct: Problems of ethics. Harcourt Brace Jovanovich.
Chicago Style (17th ed.) Zitazioa
Hospers, John. Human Conduct: Problems of Ethics. New York: Harcourt Brace Jovanovich, 1972.
MLA (9th ed.) Zitazioa
Hospers, John. Human Conduct: Problems of Ethics. Harcourt Brace Jovanovich, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.