Geisler, N. L. (1971). Ethics: Alternatives and issues. Zondervan.
Chicago-čujuhus (17. p.)Geisler, Norman L. Ethics: Alternatives and Issues. Grand Rapids: Zondervan, 1971.
MLA-čujuhus (9. p.)Geisler, Norman L. Ethics: Alternatives and Issues. Zondervan, 1971.
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