Citazione Stile APA (7a Edizione)

Twentieth Century Fund & May, S. (1952). Costa Rica, a study in economic development. [s.n.

Citazione stile Chigago Style (17a edizione)

Twentieth Century Fund e Stacy May. Costa Rica, a Study in Economic Development. New York: [s.n, 1952.

Citatione MLA (9a ed.)

Twentieth Century Fund e Stacy May. Costa Rica, a Study in Economic Development. [s.n, 1952.