APA (7th ed.) Citation

Ostrolenk, B., Bell, J. F., & Gottsegen, J. J. (1941). Economic geography. Richard D. Irwin, inc..

Chicago Style (17th ed.) Citation

Ostrolenk, Bernhard, John Fred Bell, and Jack Jacob Gottsegen. Economic Geography. Chicago: Richard D. Irwin, inc., 1941.

MLA (9th ed.) Citation

Ostrolenk, Bernhard, et al. Economic Geography. Richard D. Irwin, inc., 1941.