Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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