Gaya APA

Gehlbach, F, R. (1981). Mountain Islands and Desert Seas : A Natural History of The U.S.-Mexican Borderlands (Ed.1). Texas: Texas A.M.University Press.

Gaya MLA

Gehlbach, Frederick, R.. "Mountain Islands and Desert Seas : A Natural History of The U.S.-Mexican Borderlands". Ed.1 Texas: Texas A.M.University Press, 1981. Text.