Παραπομπή APA

Kohler, H. (1970). Economics: The science of scarcity. Dryden Press.

Παραπομπή Chicago Style

Kohler, Heinz. Economics: The Science of Scarcity. Illinois: Dryden Press, 1970.

Παραπομπή MLA

Kohler, Heinz. Economics: The Science of Scarcity. Dryden Press, 1970.