(1991). Costing the earth. London: The economist books.
Trích dẫn kiểu ChicagoCosting the Earth. London: The economist books, 1991.
MLA引文Costing the Earth. London: The economist books, 1991.
警告：这些引文格式不一定是100％准确.
APA引文
(1991). Costing the earth. London: The economist books.
Trích dẫn kiểu ChicagoCosting the Earth. London: The economist books, 1991.
MLA引文Costing the Earth. London: The economist books, 1991.