APA-čujuhus (7. p.)

Barker, S. F. (1989). The elements of logic (5th ed.). McGraw-Hill.

Chicago-čujuhus (17. p.)

Barker, Stephen F. The Elements of Logic. 5th ed. New York: McGraw-Hill, 1989.

MLA-čujuhus (9. p.)

Barker, Stephen F. The Elements of Logic. 5th ed. McGraw-Hill, 1989.

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