APA aipamena

Rand,Ayn. (1961). Virtue of selfishness. Signet Book.

Chicago Style aipamena

Rand,Ayn. Virtue of Selfishness. New Jersey: Signet Book, 1961.

MLA aipamena

Rand,Ayn. Virtue of Selfishness. Signet Book, 1961.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.