a. (1998). World Resousces 1998 - 1999. New York: Oxford university press.
Trích dẫn kiểu Chicagoa. World Resousces 1998 - 1999. New York: Oxford university press, 1998.
MLA引文a. World Resousces 1998 - 1999. New York: Oxford university press, 1998.
警告：這些引文格式不一定是100％准確.