APA (7th ed.) Citation

Peek, J. D. (1993). MH & xmh: E-mail for users and programmers (2nd ed., rev.). O'Reilly & Associates.

Chicago Style (17th ed.) Citation

Peek, Jerry D. MH & Xmh: E-mail for Users and Programmers. 2nd ed., rev. Sebastopol, CA: O'Reilly & Associates, 1993.

MLA (9th ed.) Citation

Peek, Jerry D. MH & Xmh: E-mail for Users and Programmers. 2nd ed., rev. O'Reilly & Associates, 1993.