Costales, B., & Allman, E. (1993). Sendmail. O'Reilly & Associates, Inc.
Chicago Style (17th ed.) CitationCostales, Bryan, and Eric Allman. Sendmail. Sebastopol, Calif: O'Reilly & Associates, Inc, 1993.
MLA (9th ed.) CitationCostales, Bryan, and Eric Allman. Sendmail. O'Reilly & Associates, Inc, 1993.
Warning: These citations may not always be 100% accurate.