APA引文

U.S. Bureau of Mines. (1965). Mineral facts and problems. s.n.

芝加哥风格引文

U.S. Bureau of Mines. Mineral Facts and Problems. Washington: s.n, 1965.

MLA引文

U.S. Bureau of Mines. Mineral Facts and Problems. s.n, 1965.

警告：这些引文格式不一定是100％准确.