Gaya APA

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

Gaya MLA

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