APA (7th ed.) Zitazioa

Webber, R. E. (1982). Secular humanism: Threat and challenge. Zondervan.

Chicago Style (17th ed.) Zitazioa

Webber, Robert E. Secular Humanism: Threat and Challenge. Michigan: Zondervan, 1982.

MLA (9th ed.) Zitazioa

Webber, Robert E. Secular Humanism: Threat and Challenge. Zondervan, 1982.