APA (7th ed.) Citation

Frey, D., & Adams, R. (1994). !%@: : a directory of electronic mail addressing & networks (4th ed.). O'Reilly & Associates.

Chicago Style (17th ed.) Citation

Frey, Donnalyn, and Rick Adams. !%@: : A Directory of Electronic Mail Addressing & Networks. 4th ed. Sebastopol, CA: O'Reilly & Associates, 1994.

MLA (9th ed.) Citation

Frey, Donnalyn, and Rick Adams. !%@: : A Directory of Electronic Mail Addressing & Networks. 4th ed. O'Reilly & Associates, 1994.

Warning: These citations may not always be 100% accurate.