APA (7th ed.) Zitazioa
Harpur, T. (1977). The road to Bethlehem: Two thousand... David Cook.
Chicago Style (17th ed.) Zitazioa
Harpur, Tom. The Road to Bethlehem: Two Thousand... Illinois: David Cook, 1977.
MLA (9th ed.) Zitazioa
Harpur, Tom. The Road to Bethlehem: Two Thousand... David Cook, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.