Παραπομπή APA

Weller, J. M. (1960). Stratigraphic Principles and Practice. Harper&Brothers.

Παραπομπή Chicago Style

Weller, J. Marvin. Stratigraphic Principles and Practice. New York: Harper&Brothers, 1960.

Παραπομπή MLA

Weller, J. Marvin. Stratigraphic Principles and Practice. Harper&Brothers, 1960.