APA (7th ed.) Citation

Packard, H. (1990). The Ultimate Guide to the vi and ex Text Editors. The Benjamin/Cummings Publishing Company.

Chicago Style (17th ed.) Citation

Packard, Hewlett. The Ultimate Guide to the Vi and Ex Text Editors. Redwood City California: The Benjamin/Cummings Publishing Company, 1990.

MLA (8th ed.) Citation

Packard, Hewlett. The Ultimate Guide to the Vi and Ex Text Editors. The Benjamin/Cummings Publishing Company, 1990.