APA استشهاد

Tinbergen, J. (1972). Optimum Social Welfare and productivity; A Comparative View. University.

استشهاد بنمط شيكاغو

Tinbergen, Jan. Optimum Social Welfare and Productivity; A Comparative View. New York: University, 1972.

MLA استشهاد

Tinbergen, Jan. Optimum Social Welfare and Productivity; A Comparative View. University, 1972.