APA (7th ed.) Zitazioa
Lewis, W. A. (1969). Some aspects of economic development. Ghana publishing press.
Chicago Style (17th ed.) Zitazioa
Lewis, W. Arthur. Some Aspects of Economic Development. Accra: Ghana publishing press, 1969.
MLA (9th ed.) Zitazioa
Lewis, W. Arthur. Some Aspects of Economic Development. Ghana publishing press, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.