Heathfield, D. F. (1987). An introduction to cost and production functions. New York: Macmillan.
Trích dẫn kiểu ChicagoHeathfield, David F. An Introduction to Cost and Production Functions. New York: Macmillan, 1987.
MLA引文Heathfield, David F. An Introduction to Cost and Production Functions. New York: Macmillan, 1987.
警告：這些引文格式不一定是100％准確.