APA (7th ed.) Citation

Costales, B., & Allman, E. (1997). sendmail: Desktop reference (1. ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Costales, Bryan, and Eric Allman. Sendmail: Desktop Reference. 1. ed. Cambridge [u.a.]: O'Reilly, 1997.

MLA (9th ed.) Citation

Costales, Bryan, and Eric Allman. Sendmail: Desktop Reference. 1. ed. O'Reilly, 1997.