APA (7th ed.) Citation

Duffy, T. (1986). Four software tools plus: Applications and concepts. Wadsworth Publishing Co..

Chicago Style (17th ed.) Citation

Duffy, Tim. Four Software Tools Plus: Applications and Concepts. California: Wadsworth Publishing Co., 1986.

MLA (9th ed.) Citation

Duffy, Tim. Four Software Tools Plus: Applications and Concepts. Wadsworth Publishing Co., 1986.

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