APA (7th ed.) Citation

Costales, B., & Allman, E. (1997). Sendmail (2. ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Costales, Bryan, and Eric Allman. Sendmail. 2. ed. Cambridge [u.a.]: O'Reilly, 1997.

MLA (9th ed.) Citation

Costales, Bryan, and Eric Allman. Sendmail. 2. ed. O'Reilly, 1997.