Cita APA (7th ed.)

O’Leary, T. J., & O’Leary. Computing essentials 2008 (Complete ed., 19th.). McGraw-Hill/Irwin.

Cita Chicago (17th ed.)

O’Leary, Timothy J., i O’Leary. Computing Essentials 2008. Complete ed., 19th. New York, NY: McGraw-Hill/Irwin.

Cita MLA (9th ed.)

O’Leary, Timothy J., i O’Leary. Computing Essentials 2008. Complete ed., 19th. McGraw-Hill/Irwin.