Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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