APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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