Gaya APA

J.O'Leary, T., I.O'Leary, L. (2006). Computing essentials 2006. introductory edition . Toronto: McGraw-Hill.

Gaya MLA

J.O'Leary, Timothy., I.O'Leary, Linda. "Computing essentials 2006. introductory edition". Toronto: McGraw-Hill, 2006. Text.