APA (7th ed.) Citation

Lumsden, K. G. (1965). International trade: A Behavioral Research Laboratories programmed text. Behavioral Research Laboratories.

Chicago Style (17th ed.) Citation

Lumsden, Keith G. International Trade: A Behavioral Research Laboratories Programmed Text. Palo Alto, Calif.: Behavioral Research Laboratories, 1965.

MLA (8th ed.) Citation

Lumsden, Keith G. International Trade: A Behavioral Research Laboratories Programmed Text. Behavioral Research Laboratories, 1965.