Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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