APA (7th ed.) Citation

(1987). UNIX system V: User's reference manual. Prentice-Hall.

Chicago Style (17th ed.) Citation

UNIX System V: User's Reference Manual. Englewood Cliffs, NJ: Prentice-Hall, 1987.

MLA (9th ed.) Citation

UNIX System V: User's Reference Manual. Prentice-Hall, 1987.