Hagen, E. E. (1962). On theory of social change: How economic growth begins. Vakils, feffer and simons private limited,hague bu.
استشهاد بنمط شيكاغوHagen, Everett E. On Theory of Social Change: How Economic Growth Begins. Bombay: Vakils, feffer and simons private limited,hague bu, 1962.
MLA استشهادHagen, Everett E. On Theory of Social Change: How Economic Growth Begins. Vakils, feffer and simons private limited,hague bu, 1962.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.