Long, D. E. (1978). The Persian Gulf: An introduction to its peoples, politics, and economics (Second edition.). Westview Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Long, David E. The Persian Gulf: An Introduction to Its Peoples, Politics, and Economics. Second edition. Boulder, Colo.: Westview Press, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Long, David E. The Persian Gulf: An Introduction to Its Peoples, Politics, and Economics. Second edition. Westview Press, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.