Gaya APA

Copi, Irving M. (1968). Introduction to Logic . New York: Thwe Macmillan Company.

Gaya Chicago

Copi, Irving M. Introduction to Logic. New York: Thwe Macmillan Company, 1968. Text.

Gaya MLA

Copi, Irving M. Introduction to Logic. New York: Thwe Macmillan Company, 1968. Text.

Gaya Turabian

Copi, Irving M. Introduction to Logic. New York: Thwe Macmillan Company, 1968. Print.