Citação norma APA

International Conference on Processing and Utilization of High Sulfur Coals (4th : 1991 : Idaho Falls, Idaho), Attia, Y. A., Dungan, P. R., & Quigley, D. R. (1991). Processing and utilization of high-sulfur coals IV: Proceedings of the Fourth International Conference on Processing and Utilization of High-Sulfur Coals, August 26-30, 1991, Idaho Falls, Idaho, U.S.A. Elsevier.

Citação norma Chicago

International Conference on Processing and Utilization of High Sulfur Coals (4th : 1991 : Idaho Falls, Idaho), Yosry A. Attia, P. R. Dungan, and D. R. Quigley. Processing and Utilization of High-sulfur Coals IV: Proceedings of the Fourth International Conference on Processing and Utilization of High-Sulfur Coals, August 26-30, 1991, Idaho Falls, Idaho, U.S.A. Amsterdam: Elsevier, 1991.

Citação norma MLA

International Conference on Processing and Utilization of High Sulfur Coals (4th : 1991 : Idaho Falls, Idaho), et al. Processing and Utilization of High-sulfur Coals IV: Proceedings of the Fourth International Conference on Processing and Utilization of High-Sulfur Coals, August 26-30, 1991, Idaho Falls, Idaho, U.S.A. Elsevier, 1991.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.