APA (7th ed.) Zitazioa
Engberg, J., Jacobsen, A., & Ulrich, J. (2014). In defence of Christianity: Early Christian apologists. Peter Lang GmbH.
Chicago Style (17th ed.) Zitazioa
Engberg, Jakob, Anders-Christian Jacobsen, eta Jörg Ulrich. In Defence of Christianity: Early Christian Apologists. Frankfurt am Main, [Germany] ; Bern, [Switzerland]: Peter Lang GmbH, 2014.
MLA (9th ed.) Zitazioa
Engberg, Jakob, et al. In Defence of Christianity: Early Christian Apologists. Peter Lang GmbH, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.