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