APA (7th ed.) Citation

American Telephone and Telegraph Company. (1989). UNIX system V release 3.2. Prentice Hall.

Chicago Style (17th ed.) Citation

American Telephone and Telegraph Company. UNIX System V Release 3.2. Englewood Cliffs, N.J.: Prentice Hall, 1989.

MLA (9th ed.) Citation

American Telephone and Telegraph Company. UNIX System V Release 3.2. Prentice Hall, 1989.