Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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