APA (7th ed.) Citation

AT & T Information Systems (Firm). (1986). The UNIX system user's manual. Prentice-Hall.

Chicago Style (17th ed.) Citation

AT & T Information Systems (Firm). The UNIX System User's Manual. Englewood Cliffs, N.J.: Prentice-Hall, 1986.

MLA (9th ed.) Citation

AT & T Information Systems (Firm). The UNIX System User's Manual. Prentice-Hall, 1986.