APA
Clifford S. H., Sawyer S. C., . (1994). Computer Essentials. Burr Ridge, Ill: Irwin.
Chicago
Clifford Sarah Hutchinson, Sawyer Stacey C, . 1994. Computer Essentials. Burr Ridge, Ill: Irwin.
Harvard
Clifford S. H., Sawyer S. C., . (1994). Computer Essentials. Burr Ridge, Ill: Irwin.
MLA
Clifford Sarah Hutchinson, Sawyer Stacey C, . Computer Essentials. Burr Ridge, Ill: Irwin. 1994.