APA (7th ed.) Zitazioa
Keosian, J. (1965). The Origin of life. Chapman and Hall.
Chicago Style (17th ed.) Zitazioa
Keosian, John. The Origin of Life. London: Chapman and Hall, 1965.
MLA (9th ed.) Zitazioa
Keosian, John. The Origin of Life. Chapman and Hall, 1965.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.