Marshall, A. (1981). Principles of economics. London: Macmillan.
Trích dẫn kiểu ChicagoMarshall, Alfred. Principles of Economics. London: Macmillan, 1981.
MLA引文Marshall, Alfred. Principles of Economics. London: Macmillan, 1981.
警告：這些引文格式不一定是100％准確.