Citazione Stile APA (7a Edizione)

Spencer, E. W. (1962). Basic concepts of physical geology. Oxford.

Citazione stile Chigago Style (17a edizione)

Spencer, Edgar Winston. Basic Concepts of Physical Geology. New Delhi: Oxford, 1962.

Citatione MLA (9a ed.)

Spencer, Edgar Winston. Basic Concepts of Physical Geology. Oxford, 1962.