Citazione Stile APA (7a Edizione)

Tomkins, D. M. (1982). North America: The land and the people (4. ed.). Gage.

Citazione stile Chigago Style (17a edizione)

Tomkins, Doreen Margaret. North America: The Land and the People. 4. ed. Toronto, Ont: Gage, 1982.

Citatione MLA (9a ed.)

Tomkins, Doreen Margaret. North America: The Land and the People. 4. ed. Gage, 1982.