APA (7th ed.) Citation

Frey, D. (1990). A directory of electronic mail addressing and networks (2nd rev. ed.). O'Reilly & Associates.

Chicago Style (17th ed.) Citation

Frey, Donnalyn. A Directory of Electronic Mail Addressing and Networks. 2nd rev. ed. Sabastopol, Calif.: O'Reilly & Associates, 1990.

MLA (9th ed.) Citation

Frey, Donnalyn. A Directory of Electronic Mail Addressing and Networks. 2nd rev. ed. O'Reilly & Associates, 1990.