APA (7th ed.) Citation

Poole, P. C., & Poole, N. (1986). Using UNIX by example. Addison-Wesley.

Chicago Style (17th ed.) Citation

Poole, P. C., and N. Poole. Using UNIX by Example. Wokingham, England u.a: Addison-Wesley, 1986.

MLA (9th ed.) Citation

Poole, P. C., and N. Poole. Using UNIX by Example. Addison-Wesley, 1986.