Citazione Stile APA (7a Edizione)

Colm, G., & Geiger, T. (1961). The Economy of the American people (2nd ed.). National Planning Association.

Citazione stile Chigago Style (17a edizione)

Colm, Gerhard, e Theodore Geiger. The Economy of the American People. 2nd ed. Washington, D.C: National Planning Association, 1961.

Citatione MLA (9a ed.)

Colm, Gerhard, e Theodore Geiger. The Economy of the American People. 2nd ed. National Planning Association, 1961.