APA (7th ed.) Citation

Duffi, T. (1986). Four Software Tools. Wodsworth Pub Co.

Chicago Style (17th ed.) Citation

Duffi, Tim. Four Software Tools. Wodsworth Pub Co, 1986.

MLA (8th ed.) Citation

Duffi, Tim. Four Software Tools. Wodsworth Pub Co, 1986.

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