APA (7th ed.) Citation

Ushenko, A. P. (1936). The theory of logic: An introductory text. Harper.

Chicago Style (17th ed.) Citation

Ushenko, Andrew P. The Theory of Logic: An Introductory Text. New York u.a: Harper, 1936.

MLA (9th ed.) Citation

Ushenko, Andrew P. The Theory of Logic: An Introductory Text. Harper, 1936.