APA (7e ed.) Bronvermelding
Graham, A. (1999). Late Cretaceous and Cenozoic history of North American vegetation, north of Mexico. Oxford University Press.
Chicago (17e ed.) Bronvermelding
Graham, Alan. Late Cretaceous and Cenozoic History of North American Vegetation, North of Mexico. New York: Oxford University Press, 1999.
MLA (9e ed.) Bronvermelding
Graham, Alan. Late Cretaceous and Cenozoic History of North American Vegetation, North of Mexico. Oxford University Press, 1999.
Let op: Deze citaties zijn niet altijd 100% accuraat.