APA استشهاد

Hagen, E. E. (1962). On theory of social change: How economic growth begins. Vakils, feffer and simons private limited,hague bu.

استشهاد بنمط شيكاغو

Hagen, Everett E. On Theory of Social Change: How Economic Growth Begins. Bombay: Vakils, feffer and simons private limited,hague bu, 1962.

MLA استشهاد

Hagen, Everett E. On Theory of Social Change: How Economic Growth Begins. Vakils, feffer and simons private limited,hague bu, 1962.