APA (7th ed.) Citation
Groff, J. R., & Weinberg, P. N. (1988). Understanding UNIX: A Conceptual Guide. James R.Groff and Paul N.Weinberg.
Chicago Style (17th ed.) Citation
Groff, James R., and Paul N. Weinberg. Understanding UNIX: A Conceptual Guide. Carmel: James R.Groff and Paul N.Weinberg, 1988.
MLA (9th ed.) Citation
Groff, James R., and Paul N. Weinberg. Understanding UNIX: A Conceptual Guide. James R.Groff and Paul N.Weinberg, 1988.
Warning: These citations may not always be 100% accurate.