Caldwell, W. E. (1968). Chemistry simplified. N. Y.: Barnes & Noble.
Trích dẫn kiểu ChicagoCaldwell, William E. Chemistry Simplified. N. Y.: Barnes & Noble, 1968.
MLA引文Caldwell, William E. Chemistry Simplified. N. Y.: Barnes & Noble, 1968.
警告：這些引文格式不一定是100％准確.