APA (7th ed.) Citation

Groff, J. R., & Weinberg, P. N. (1992). Understanding Unix: A conceptual guide (2nd ed.). Que Corporation.

Chicago Style (17th ed.) Citation

Groff, James R., and Paul N. Weinberg. Understanding Unix: A Conceptual Guide. 2nd ed. Carmel, IN: Que Corporation, 1992.

MLA (9th ed.) Citation

Groff, James R., and Paul N. Weinberg. Understanding Unix: A Conceptual Guide. 2nd ed. Que Corporation, 1992.