Παραπομπή APA

Cooper, F., & Bureau of Mines. United States. (1977). The U.S. foundry coke industry. Washington: U.S. Dept. of the Interior, Bureau of Mines.

Παραπομπή Chicago Style

Cooper, Franklin., and Bureau of Mines. United States. The U.S. Foundry Coke Industry. Washington: U.S. Dept. of the Interior, Bureau of Mines, 1977.

Παραπομπή MLA

Cooper, Franklin., and Bureau of Mines. United States. The U.S. Foundry Coke Industry. Washington: U.S. Dept. of the Interior, Bureau of Mines, 1977.

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