Citazione Stile APA (7a Edizione)

Warntz, W. (1964). Geography now and then : some notes on: The history of academic geography in the. American Geographical society.

Citazione stile Chigago Style (17a edizione)

Warntz, William. Geography Now and Then : Some Notes on: The History of Academic Geography in the. New York: American Geographical society, 1964.

Citatione MLA (9a ed.)

Warntz, William. Geography Now and Then : Some Notes on: The History of Academic Geography in the. American Geographical society, 1964.