Παραπομπή APA

Thomas, R. S. (1962). The geography of economic activity: An introduction to world survey. New York: Mc Graw-Hill.

Παραπομπή Chicago Style

Thomas, Richard Samuel. The Geography of Economic Activity: An Introduction to World Survey. New York: Mc Graw-Hill, 1962.

Παραπομπή MLA

Thomas, Richard Samuel. The Geography of Economic Activity: An Introduction to World Survey. New York: Mc Graw-Hill, 1962.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.