APA استشهاد

Groff, J. R., & Weiberg, P. N. (1983). Understanding <UNIX>: A conceptual guide. IBT.

استشهاد بنمط شيكاغو

Groff, James R., و Paul N. Weiberg. Understanding <UNIX>: A Conceptual Guide. Delhi: IBT, 1983.

MLA استشهاد

Groff, James R., و Paul N. Weiberg. Understanding <UNIX>: A Conceptual Guide. IBT, 1983.