APA-čujuhus (7. p.)

JEFFREY, R. C. (1967). Formal logic: Its scope and limits. McGraw-Hill.

Chicago-čujuhus (17. p.)

JEFFREY, Richard C. Formal Logic: Its Scope and Limits. New York: McGraw-Hill, 1967.

MLA-čujuhus (9. p.)

JEFFREY, Richard C. Formal Logic: Its Scope and Limits. McGraw-Hill, 1967.

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