APA (7th ed.) Zitazioa
Howard, J. G. (1987). Creativity in preaching. Ministry Resources Library.
Chicago Style (17th ed.) Zitazioa
Howard, J. Grant. Creativity in Preaching. Grand Rapids, Mich.: Ministry Resources Library, 1987.
MLA (9th ed.) Zitazioa
Howard, J. Grant. Creativity in Preaching. Ministry Resources Library, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.