APA (7th ed.) Citation

Catapult & Doyle, C. D. (1994). Microsoft Excel 5 for Windows: Step by step. Catapult.

Chicago Style (17th ed.) Citation

Catapult and Casey D. Doyle. Microsoft Excel 5 for Windows: Step by Step. Washington: Catapult, 1994.

MLA (8th ed.) Citation

Catapult and Casey D. Doyle. Microsoft Excel 5 for Windows: Step by Step. Catapult, 1994.