Παραπομπή APA

Turrvey, R. (1971). Demand and supply. George Allen and Unwin.

Παραπομπή Chicago Style

Turrvey, Ralph. Demand and Supply. London: George Allen and Unwin, 1971.

Παραπομπή MLA

Turrvey, Ralph. Demand and Supply. George Allen and Unwin, 1971.