APA (7th ed.) Zitazioa

Morris, H. M. (1963). The twilight of evolution. Baker Book House.

Chicago Style (17th ed.) Zitazioa

Morris, Henry Madison. The Twilight of Evolution. Grand Rapids: Baker Book House, 1963.

MLA (9th ed.) Zitazioa

Morris, Henry Madison. The Twilight of Evolution. Baker Book House, 1963.