The theory of logic :
an introductory text /
by A.P. Ushenko.

APA Citation

Ushenko, A. Paul. (1936). The theory of logic: an introductory text. New York: Harper & Brothers.

MLA Citation

Ushenko, Andrew Paul, 1897-. The Theory of Logic: an Introductory Text. New York: Harper & Brothers, 1936.

Warning: These citations may not always be complete (especially for serials).