APA (7th ed.) Citation

Costales, B., & Allman, E. (1997). Sendmail desktop reference. O'Reilly & Associates.

Chicago Style (17th ed.) Citation

Costales, Bryan, and Eric Allman. Sendmail Desktop Reference. Beijing ; : Cambridge: O'Reilly & Associates, 1997.

MLA (9th ed.) Citation

Costales, Bryan, and Eric Allman. Sendmail Desktop Reference. O'Reilly & Associates, 1997.