توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Green, R. T. (1972). Political instability as a determinant of U.S. foreign investment. Bureau of Business Reseach, University of Texas at Austin.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Green, Robert T. Political Instability as a Determinant of U.S. Foreign Investment. Austin: Bureau of Business Reseach, University of Texas at Austin, 1972.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Green, Robert T. Political Instability as a Determinant of U.S. Foreign Investment. Bureau of Business Reseach, University of Texas at Austin, 1972.