Citazione Stile APA (7a Edizione)

Case, E. C., & Bergsmark, D. R. (1983). Modern world geography, economic and social. J. B. Lippincott Company.

Citazione stile Chigago Style (17a edizione)

Case, Earl Clark, e Daniel R. Bergsmark. Modern World Geography, Economic and Social. Philadelphia: J. B. Lippincott Company, 1983.

Citatione MLA (9a ed.)

Case, Earl Clark, e Daniel R. Bergsmark. Modern World Geography, Economic and Social. J. B. Lippincott Company, 1983.