Παραπομπή σε μορφή APA (7η εκδ.)

Hudson, J. C. (2002). Across this land: A regional geography of the United States and Canada. Johns Hopkins University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hudson, John C. Across This Land: A Regional Geography of the United States and Canada. Baltimore: Johns Hopkins University Press, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hudson, John C. Across This Land: A Regional Geography of the United States and Canada. Johns Hopkins University Press, 2002.