APA

Copi I. M., Cohen C. & McMahon K. (2010). Introduction to Logic. Boston (Massachusetts, Estados Unidos): Pretince Hall.

Chicago

Copi Irving M, Cohen Carl and McMahon Kenneth. 2010. Introduction to Logic. Boston (Massachusetts, Estados Unidos): Pretince Hall.

Harvard

Copi I. M., Cohen C. and McMahon K. (2010). Introduction to Logic. Boston (Massachusetts, Estados Unidos): Pretince Hall.

MLA

Copi Irving M, Cohen Carl and McMahon Kenneth. Introduction to Logic. Boston (Massachusetts, Estados Unidos): Pretince Hall. 2010.