APA (7th ed.) Citation

Johnson. (1999). Internet email protocol: A developer's guide. Addison-Wesley.

Chicago Style (17th ed.) Citation

Johnson. Internet Email Protocol: A Developer's Guide. California: Addison-Wesley, 1999.

MLA (9th ed.) Citation

Johnson. Internet Email Protocol: A Developer's Guide. Addison-Wesley, 1999.

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