William Morris. (1954). Geographical essays. Dower Publications.
Chicago Style (17th ed.) ZitazioaWilliam Morris. Geographical Essays. New York: Dower Publications, 1954.
MLA (9th ed.) ZitazioaWilliam Morris. Geographical Essays. Dower Publications, 1954.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.