Gaya APA

Copi, I, M., Swanson, C, P. (1954). Symbolic logic . New York: New York: Macmillan; 1954..

Gaya MLA

Copi, Irving, M.., Swanson, Carl, P.. "Symbolic logic". New York: New York: Macmillan; 1954., 1954. Text.