United States. Bureau of Mines. (1942). Monthly Petroleum Statement No. P. 226, Crude petroleum and petroleum products, July 1942. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Monthly Petroleum Statement No. P. 226, Crude Petroleum and Petroleum Products, July 1942. [Washington]: [s.n.], 1942.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Monthly Petroleum Statement No. P. 226, Crude Petroleum and Petroleum Products, July 1942. [s.n.], 1942.
Warning: These citations may not always be 100% accurate.