Cita APA (7a ed.)

McCarthy, M. (2002). Procmail companion (1st edition.). Addison-Wesley.

Cita Chicago Style (17a ed.)

McCarthy, Martin. Procmail Companion. 1st edition. Harlow, England ; New York: Addison-Wesley, 2002.

Cita MLA (9a ed.)

McCarthy, Martin. Procmail Companion. 1st edition. Addison-Wesley, 2002.