Zimmermann, P. (1996). The official PGP user's guide. MIT.
Chicago Style (17th ed.) CitationZimmermann, Philip. The Official PGP User's Guide. Cambridge (Massachusetts) [etc.]: MIT, 1996.
MLA (9th ed.) CitationZimmermann, Philip. The Official PGP User's Guide. MIT, 1996.
Warning: These citations may not always be 100% accurate.