Citazione Stile APA (7a Edizione)

Huebner, G. G., & Kramer, R. L. (1942). Foreign trade principles and practices. Appleton-Century-Crofts.

Citazione stile Chigago Style (17a edizione)

Huebner, Grover Gerhardt, e Roland Laird Kramer. Foreign Trade Principles and Practices. New York: Appleton-Century-Crofts, 1942.

Citatione MLA (9a ed.)

Huebner, Grover Gerhardt, e Roland Laird Kramer. Foreign Trade Principles and Practices. Appleton-Century-Crofts, 1942.