APA (7th ed.) Citation

Townsend, C. (1992). Mastering Excel 4 for Windows. Tech Publications.

Chicago Style (17th ed.) Citation

Townsend, Carl. Mastering Excel 4 for Windows. Singapore: Tech Publications, 1992.

MLA (9th ed.) Citation

Townsend, Carl. Mastering Excel 4 for Windows. Tech Publications, 1992.