Cita APA (7a ed.)

Thoman, R. S., & Conkling, E. C. (1967). Geography of international trade. Prentice-Hall.

Cita Chicago Style (17a ed.)

Thoman, Richard Samuel, y Edgar C. Conkling. Geography of International Trade. Englewood Cliffs, New Jersey: Prentice-Hall, 1967.

Cita MLA (9a ed.)

Thoman, Richard Samuel, y Edgar C. Conkling. Geography of International Trade. Prentice-Hall, 1967.