Foley, G. (1987). The energy question. London: Penguin Books.
Trích dẫn kiểu ChicagoFoley, Gerald. The Energy Question. London: Penguin Books, 1987.
MLA引文Foley, Gerald. The Energy Question. London: Penguin Books, 1987.
警告：這些引文格式不一定是100％准確.
APA引文