Citazione APA

Odegard, P. H., & Helms, E. A. (1947). American politics, a study in political dynamics (2d ed.). Harper.

Stile di citazione Chicago

Odegard, Peter H., e E. Allen Helms. American Politics, a Study in Political Dynamics. 2d ed. New York: Harper, 1947.

Citazione MLA

Odegard, Peter H., e E. Allen Helms. American Politics, a Study in Political Dynamics. 2d ed. Harper, 1947.