APA (7th ed.) Citation

Bilbo, M. K. (1992). DR DOS 6 quick references. Que Corporation.

Chicago Style (17th ed.) Citation

Bilbo, Mark K. DR DOS 6 Quick References. Carmel, Ind: Que Corporation, 1992.

MLA (9th ed.) Citation

Bilbo, Mark K. DR DOS 6 Quick References. Que Corporation, 1992.