APA (7th ed.) Citation

Safari Tech Books Online, Lamb, L. A., & Robbins, A. C. (1998). Learning the vi editor (6th ed.). O'Reilly & Associates.

Chicago Style (17th ed.) Citation

Safari Tech Books Online, Linda Author Lamb, and Arnold Contributor Robbins. Learning the Vi Editor. 6th ed. [Place of publication not identified]: O'Reilly & Associates, 1998.

MLA (9th ed.) Citation

Safari Tech Books Online, et al. Learning the Vi Editor. 6th ed. O'Reilly & Associates, 1998.