APA (7th ed.) Citation

Quarterman, J. S., & Wilhelm, S. (1993). UNIX, POSIX, and the open standards puzzle. Addison-Wesley.

Chicago Style (17th ed.) Citation

Quarterman, John S., and Susanne Wilhelm. UNIX, POSIX, and the Open Standards Puzzle. Reading, Mass.: Addison-Wesley, 1993.

MLA (9th ed.) Citation

Quarterman, John S., and Susanne Wilhelm. UNIX, POSIX, and the Open Standards Puzzle. Addison-Wesley, 1993.