APA (7th ed.) Zitazioa
Richardson, D. (1981). Eternity in their hearts. Regal Books.
Chicago Style (17th ed.) Zitazioa
Richardson, Don. Eternity in Their Hearts. Ventura, CA, U.S.A.: Regal Books, 1981.
MLA (9th ed.) Zitazioa
Richardson, Don. Eternity in Their Hearts. Regal Books, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.