APA (7th ed.) Citation

Case, E. C., & Bergsmark, D. R. (1938). Modern world geography, economic and social. Lippincott.

Chicago Style (17th ed.) Citation

Case, Earl C., and Daniel Rockman Bergsmark. Modern World Geography, Economic and Social. Chicago: Lippincott, 1938.

MLA (9th ed.) Citation

Case, Earl C., and Daniel Rockman Bergsmark. Modern World Geography, Economic and Social. Lippincott, 1938.