Παραπομπή APA

Holmes,Arthur, & Holmes,Doris L. (1965). Principles of physical geology (3rd ed.). The English language book society and nelson.

Παραπομπή Chicago Style

Holmes,Arthur, και Holmes,Doris L. Principles of Physical Geology. 3rd ed. London: The English language book society and nelson, 1965.

Παραπομπή MLA

Holmes,Arthur, και Holmes,Doris L. Principles of Physical Geology. 3rd ed. The English language book society and nelson, 1965.