APA (7th ed.) Citation

Norton, P., Ashley, R., & Fernandez, J. N. (1993). Peter Norton's advanced DOS 6 (2nd ed.). Brady.

Chicago Style (17th ed.) Citation

Norton, Peter, Ruth Ashley, and Judi N. Fernandez. Peter Norton's Advanced DOS 6. 2nd ed. New York: Brady, 1993.

MLA (8th ed.) Citation

Norton, Peter, et al. Peter Norton's Advanced DOS 6. 2nd ed. Brady, 1993.