APA

Sidney K., Wellman P., United States of America. Department of the Interior & Wellman P. (1971). Mining and conversion of oil shale in a gas combustion retort. United States of America: Bureau of Mines.

Chicago

Sidney Katell, Wellman Paul, United States of America. Department of the Interior and Wellman Paul. 1971. Mining and conversion of oil shale in a gas combustion retort. United States of America: Bureau of Mines.

Harvard

Sidney K., Wellman P., United States of America. Department of the Interior and Wellman P. (1971). Mining and conversion of oil shale in a gas combustion retort. United States of America: Bureau of Mines.

MLA

Sidney Katell, Wellman Paul, United States of America. Department of the Interior and Wellman Paul. Mining and conversion of oil shale in a gas combustion retort. United States of America: Bureau of Mines. 1971.