a. (1988). World Resousces 1988 - 89. New York: Basic books.
Trích dẫn kiểu Chicagoa. World Resousces 1988 - 89. New York: Basic books, 1988.
MLA引文a. World Resousces 1988 - 89. New York: Basic books, 1988.
警告：这些引文格式不一定是100％准确.
APA引文