APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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