Horn, P. V., & Gomez, H. (1959). International trade: Principles and practices (4th ed.). Prentice-Hall.
Cytowanie według stylu Chicago (wyd. 17)Horn, Paul V., i Henry Gomez. International Trade: Principles and Practices. 4th ed. The United States of America: Prentice-Hall, 1959.
Cytowanie według stylu MLA (wyd. 9)Horn, Paul V., i Henry Gomez. International Trade: Principles and Practices. 4th ed. Prentice-Hall, 1959.