APA (7th ed.) Citation

English Language Services & Vest, E. M. K. (1966). International trade. Collier-Macmillan International.

Chicago Style (17th ed.) Citation

English Language Services and E. M. Kay Vest. International Trade. London: Collier-Macmillan International, 1966.

MLA (9th ed.) Citation

English Language Services and E. M. Kay Vest. International Trade. Collier-Macmillan International, 1966.