Symbolic logic; fourth edition

MLA

Copi, I.M. Symbolic Logic; Fourth Edition. London: Collier Macmillan publishers, 1973.

APA

Copi, I. (1973). Symbolic logic; fourth edition. London: Collier Macmillan publishers.

Chicago

Copi, I.M. Symbolic Logic; Fourth Edition. London: Collier Macmillan publishers, 1973.