J.G Pounds Norman, & L.Cooper Edward. (1961). World Geography. New York: South-Western College Publishing.
Chicago Style aipamenaJ.G Pounds Norman, và L.Cooper Edward. World Geography. New York: South-Western College Publishing, 1961.
MLA aipamenaJ.G Pounds Norman, và L.Cooper Edward. World Geography. New York: South-Western College Publishing, 1961.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.