APA (7th ed.) Zitazioa
Spencer, S. (1963). Mysticism in world religion. Penguin books.
Chicago Style (17th ed.) Zitazioa
Spencer, Sidney. Mysticism in World Religion. Baltimore 11: Penguin books, 1963.
MLA (9th ed.) Zitazioa
Spencer, Sidney. Mysticism in World Religion. Penguin books, 1963.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.