APA

Copi I. M., . (1954). Symbolic logic. New York: Macmillan.

Chicago

Copi Irving M, . 1954. Symbolic logic. New York: Macmillan.

Harvard

Copi I. M., . (1954). Symbolic logic. New York: Macmillan.

MLA

Copi Irving M, . Symbolic logic. New York: Macmillan. 1954.