APA استشهاد

Gokhale, K. (2005). Principles of engineering geology. B S Publications.

استشهاد بنمط شيكاغو

Gokhale, KVGK. Principles of Engineering Geology. Hyderabad: B S Publications, 2005.

MLA استشهاد

Gokhale, KVGK. Principles of Engineering Geology. B S Publications, 2005.