APA (7th ed.) Zitazioa
Grene, M. (1959). Introduction to existentialism. University of Chicago Press.
Chicago Style (17th ed.) Zitazioa
Grene, Marjorie. Introduction to Existentialism. Chicago: University of Chicago Press, 1959.
MLA (9th ed.) Zitazioa
Grene, Marjorie. Introduction to Existentialism. University of Chicago Press, 1959.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.