Gayoso, A., & Dovring, F. (1970). Land reform in Brazil northeast, Cuba, Guatemala, Mexico. Agency for International Development, Dept. of State.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gayoso, Antonio, و Folke Dovring. Land Reform in Brazil Northeast, Cuba, Guatemala, Mexico. Washington: Agency for International Development, Dept. of State, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Gayoso, Antonio, و Folke Dovring. Land Reform in Brazil Northeast, Cuba, Guatemala, Mexico. Agency for International Development, Dept. of State, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.