APA

Frost C. M., Cottingham P. L., . (1974). Methods for refining crude shale oil produced by in situ retorting. [Washington, DC]: Bureau of Mines, U.S. Dep. of the Interior.

Chicago

Frost Clyde M, Cottingham Philip L, . 1974. Methods for refining crude shale oil produced by in situ retorting. [Washington, DC]: Bureau of Mines, U.S. Dep. of the Interior.

Harvard

Frost C. M., Cottingham P. L., . (1974). Methods for refining crude shale oil produced by in situ retorting. [Washington, DC]: Bureau of Mines, U.S. Dep. of the Interior.

MLA

Frost Clyde M, Cottingham Philip L, . Methods for refining crude shale oil produced by in situ retorting. [Washington, DC]: Bureau of Mines, U.S. Dep. of the Interior. 1974.