Levin, J. V. (1960). Export economies: Their pattern of development in historical perspective. Harvard.
استشهاد بنمط شيكاغوLevin, Jonathan V. Export Economies: Their Pattern of Development in Historical Perspective. Combridge: Harvard, 1960.
MLA استشهادLevin, Jonathan V. Export Economies: Their Pattern of Development in Historical Perspective. Harvard, 1960.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.