Webber, R. E. (1982). Secular humanism: Threat and challenge. Zondervan.
Chicago-čujuhus (17. p.)Webber, Robert E. Secular Humanism: Threat and Challenge. Michigan: Zondervan, 1982.
MLA-čujuhus (9. p.)Webber, Robert E. Secular Humanism: Threat and Challenge. Zondervan, 1982.
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