APA (7e ed.) Bronvermelding

Willrich, M. (1975). Energy and world politics. The Free Press.

Chicago (17e ed.) Bronvermelding

Willrich, Mason. Energy and World Politics. N. Y: The Free Press, 1975.

MLA (9e ed.) Bronvermelding

Willrich, Mason. Energy and World Politics. The Free Press, 1975.