Citazione Stile APA (7a Edizione)

Powrie, T. L. (1983). Political an economic systems (rev.ed.). Academic Press.

Citazione stile Chigago Style (17a edizione)

Powrie, T. L. Political an Economic Systems. rev.ed. Don Mills, Ont: Academic Press, 1983.

Citatione MLA (9a ed.)

Powrie, T. L. Political an Economic Systems. rev.ed. Academic Press, 1983.