Παραπομπή APA

Roll, C. W., & Cantril, A. H. Polls: Their use and misuse in politics.

Παραπομπή Chicago Style

Roll, Charles W., και Albert H. Cantril. Polls: Their Use and Misuse in Politics.

Παραπομπή MLA

Roll, Charles W., και Albert H. Cantril. Polls: Their Use and Misuse in Politics.