APA (7th ed.) Citation

(1985). UNIX: A practical introduction for users (1. publ.). Horwood [u.a.].

Chicago Style (17th ed.) Citation

UNIX: A Practical Introduction for Users. 1. publ. Chichester: Horwood [u.a.], 1985.

MLA (9th ed.) Citation

UNIX: A Practical Introduction for Users. 1. publ. Horwood [u.a.], 1985.