توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

International Political Science Association & Ehrmann, H. W. (1958). Interest groups on four continents: Ed. for the International Political Science Association. Pittsburgh U.P..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

International Political Science Association و Henry W. Ehrmann. Interest Groups on Four Continents: Ed. for the International Political Science Association. Pittsburgh: Pittsburgh U.P., 1958.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

International Political Science Association و Henry W. Ehrmann. Interest Groups on Four Continents: Ed. for the International Political Science Association. Pittsburgh U.P., 1958.