Cita APA (7th ed.)
Webber, R. E. (1982). Secular humanism: Threat and challenge. Zondervan.
Cita Chicago (17th ed.)
Webber, Robert E. Secular Humanism: Threat and Challenge. Michigan: Zondervan, 1982.
Cita MLA (9th ed.)
Webber, Robert E. Secular Humanism: Threat and Challenge. Zondervan, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.