United States. Department of State. External Research Program & Heare, G. E. (1976). Brazil: Foreign relations of an emerging power : summary of studies prepared for the Department of State under the External Research Program. Dept. of State, External Research Program.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Department of State. External Research Program و Gertrude E. Heare. Brazil: Foreign Relations of an Emerging Power : Summary of Studies Prepared for the Department of State Under the External Research Program. Washington, D.C.: Dept. of State, External Research Program, 1976.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. Department of State. External Research Program و Gertrude E. Heare. Brazil: Foreign Relations of an Emerging Power : Summary of Studies Prepared for the Department of State Under the External Research Program. Dept. of State, External Research Program, 1976.