APA استشهاد

Hartley, K. (1977). Problems of Economic Policy. Allen & Unwin.

استشهاد بنمط شيكاغو

Hartley, Keith. Problems of Economic Policy. London: Allen & Unwin, 1977.

MLA استشهاد

Hartley, Keith. Problems of Economic Policy. Allen & Unwin, 1977.