APA (7th ed.) Citation

Duffy, T. (1993). Essential Windows 3.1. Wadsworth Pub. Co..

Chicago Style (17th ed.) Citation

Duffy, Tim. Essential Windows 3.1. Belmont, Calif.: Wadsworth Pub. Co., 1993.

MLA (8th ed.) Citation

Duffy, Tim. Essential Windows 3.1. Wadsworth Pub. Co., 1993.

Warning: These citations may not always be 100% accurate.