Cita APA (7a ed.)

Johnson, E. R., & Huebner, G. G. (1916). Shipping: In its relation to our foreign trade. Business Training Corporation.

Cita Chicago Style (17a ed.)

Johnson, Emory R., y Grover G. Huebner. Shipping: In Its Relation to Our Foreign Trade. New York: Business Training Corporation, 1916.

Cita MLA (9a ed.)

Johnson, Emory R., y Grover G. Huebner. Shipping: In Its Relation to Our Foreign Trade. Business Training Corporation, 1916.