Bologna, S. (1973). Class composition and the theory of the party at the origin of the workers-councils movement: Structure of the labor force and political class-composition in Germany before world War I. s.n..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bologna, Sergio. Class Composition and the Theory of the Party at the Origin of the Workers-councils Movement: Structure of the Labor Force and Political Class-composition in Germany Before World War I. [S.I.: s.n., 1973.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Bologna, Sergio. Class Composition and the Theory of the Party at the Origin of the Workers-councils Movement: Structure of the Labor Force and Political Class-composition in Germany Before World War I. s.n., 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.