Drake, K. (1970). Britain's exports and the balance of payments. London: Sphere.
Trích dẫn kiểu ChicagoDrake, Keith. Britain's Exports and the Balance of Payments. London: Sphere, 1970.
MLA引文Drake, Keith. Britain's Exports and the Balance of Payments. London: Sphere, 1970.
警告：这些引文格式不一定是100％准确.