Παραπομπή APA

Levy Leonard W & Roche, J. P. (1967). The American Political Process.

Παραπομπή Chicago Style

Levy Leonard W και John P. Roche. The American Political Process. Calcutta, 1967.

Παραπομπή MLA

Levy Leonard W και John P. Roche. The American Political Process. 1967.