APA (7th ed.) Citation

Campbell, M. (1994). DOS answers: Certified support. Osborne McGraw-Hill.

Chicago Style (17th ed.) Citation

Campbell, Mary. DOS Answers: Certified Support. New York: Osborne McGraw-Hill, 1994.

MLA (9th ed.) Citation

Campbell, Mary. DOS Answers: Certified Support. Osborne McGraw-Hill, 1994.