Cita APA (7th ed.)

Thoman, R. S. (1962). The geography of economic activity; an introductory world survey. McGraw-Hill.

Cita Chicago (17th ed.)

Thoman, Richard S. The Geography of Economic Activity; an Introductory World Survey. New York: McGraw-Hill, 1962.

Cita MLA (9th ed.)

Thoman, Richard S. The Geography of Economic Activity; an Introductory World Survey. McGraw-Hill, 1962.