APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.