APA استشهاد

Bergson,Abram. (1978). Productivity and the social system-the USSR and the WEST. Harvard University Press.

استشهاد بنمط شيكاغو

Bergson,Abram. Productivity and the Social System-the USSR and the WEST. London: Harvard University Press, 1978.

MLA استشهاد

Bergson,Abram. Productivity and the Social System-the USSR and the WEST. Harvard University Press, 1978.