APA (7th ed.) Citation

Heckscher, E. F., Ohlin, B., Flam, H., & Flanders, M. J. (1991). Heckscher-Ohlin trade theory. MIT Press.

Chicago Style (17th ed.) Citation

Heckscher, Eli F., Bertil Ohlin, Henry Flam, and M. June Flanders. Heckscher-Ohlin Trade Theory. Cambridge, Mass: MIT Press, 1991.

MLA (9th ed.) Citation

Heckscher, Eli F., et al. Heckscher-Ohlin Trade Theory. MIT Press, 1991.