Citazione Stile APA (7a Edizione)

Thoman, R. S. (1974). The geography of economic activity (3rd ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Thoman, Richard S. The Geography of Economic Activity. 3rd ed. New York: McGraw-Hill, 1974.

Citatione MLA (9a ed.)

Thoman, Richard S. The Geography of Economic Activity. 3rd ed. McGraw-Hill, 1974.