Cita APA (7a ed.)

Gray, H. P. (1976). A generalized theory of international trade. Macmillan.

Cita Chicago Style (17a ed.)

Gray, H Peter. A Generalized Theory of International Trade. London: Macmillan, 1976.

Cita MLA (9a ed.)

Gray, H Peter. A Generalized Theory of International Trade. Macmillan, 1976.