APA

Bortz S. A., Higbie K. B. & Mineral Waste Utilization Symposium. (1980). Materials recycling. [Washington, D.C.]: U.S. Dep. of the Interior, Bureau of Mines.

Chicago

Bortz Seymour A, Higbie Kenneth B and Mineral Waste Utilization Symposium. 1980. Materials recycling. [Washington, D.C.]: U.S. Dep. of the Interior, Bureau of Mines.

Harvard

Bortz S. A., Higbie K. B. and Mineral Waste Utilization Symposium. (1980). Materials recycling. [Washington, D.C.]: U.S. Dep. of the Interior, Bureau of Mines.

MLA

Bortz Seymour A, Higbie Kenneth B and Mineral Waste Utilization Symposium. Materials recycling. [Washington, D.C.]: U.S. Dep. of the Interior, Bureau of Mines. 1980.