APA-čujuhus (7. p.)
Copi, I. M. (1982). Introduction to logic (6th ed.). Macmillan.
Chicago-čujuhus (17. p.)
Copi, Irving M. Introduction to Logic. 6th ed. New York: Macmillan, 1982.
MLA-čujuhus (9. p.)
Copi, Irving M. Introduction to Logic. 6th ed. Macmillan, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.