Citazione Stile APA (7a Edizione)

Davis, O. L., & Hunkins, F. P. (1971). Asking about the USA and its neighbors (Teacher ed.). American Book.

Citazione stile Chigago Style (17a edizione)

Davis, Ozro Luke, e Francis P. Hunkins. Asking About the USA and Its Neighbors. Teacher ed. New York [u.a.]: American Book, 1971.

Citatione MLA (9a ed.)

Davis, Ozro Luke, e Francis P. Hunkins. Asking About the USA and Its Neighbors. Teacher ed. American Book, 1971.