APA (7th ed.) Citation

Peek, J., Strang, J., & Tadino, G. (1993). Learning the unix operating system. O'Reilly & Associates Inc..

Chicago Style (17th ed.) Citation

Peek, Jerry, John Strang, and Grace Tadino. Learning the Unix Operating System. Sebastopol: O'Reilly & Associates Inc., 1993.

MLA (9th ed.) Citation

Peek, Jerry, et al. Learning the Unix Operating System. O'Reilly & Associates Inc., 1993.