APA (7th ed.) Zitazioa

Winston, B. J. (1991). Geography: Our country and our world. Scott, Foresman and Co..

Chicago Style (17th ed.) Zitazioa

Winston, Barbara J. Geography: Our Country and Our World. Glenview: Scott, Foresman and Co., 1991.

MLA (9th ed.) Zitazioa

Winston, Barbara J. Geography: Our Country and Our World. Scott, Foresman and Co., 1991.