Citazione Stile APA (7a Edizione)

Kiekhofer, W. H. (1951). Economic principles, problems and policies (4th ed.). Appleton-Century-Crofts.

Citazione stile Chigago Style (17a edizione)

Kiekhofer, William Henry. Economic Principles, Problems and Policies. 4th ed. New York: Appleton-Century-Crofts, 1951.

Citatione MLA (9a ed.)

Kiekhofer, William Henry. Economic Principles, Problems and Policies. 4th ed. Appleton-Century-Crofts, 1951.