(1974). Petroleum in the 1970s. New York: United States.
Trích dẫn kiểu ChicagoPetroleum in the 1970s. New York: United States, 1974.
MLA引文Petroleum in the 1970s. New York: United States, 1974.
警告：这些引文格式不一定是100％准确.
APA引文
(1974). Petroleum in the 1970s. New York: United States.
Trích dẫn kiểu ChicagoPetroleum in the 1970s. New York: United States, 1974.
MLA引文Petroleum in the 1970s. New York: United States, 1974.