Sampson, A. (1975). Seven Sisters: The great oil companies and the world they shaped. Bantam Book.
芝加哥风格引文Sampson, Anthony. Seven Sisters: The Great Oil Companies and the World They Shaped. USA: Bantam Book, 1975.
MLA引文Sampson, Anthony. Seven Sisters: The Great Oil Companies and the World They Shaped. Bantam Book, 1975.
警告：这些引文格式不一定是100％准确.