APA استشهاد

Attewell, P. B., & Farmer, I. W. (1976). Principles of Engineering Geology. Chapman & Hall.

استشهاد بنمط شيكاغو

Attewell, P. B., و I. W. Farmer. Principles of Engineering Geology. London: Chapman & Hall, 1976.

MLA استشهاد

Attewell, P. B., و I. W. Farmer. Principles of Engineering Geology. Chapman & Hall, 1976.