Williams, E. R. (2006). Ekonomi sumber daya mineral dan energi. McGraw-Hill Book Company.
Chicago Style CitationWilliams, Eleanor R. Ekonomi Sumber Daya Mineral Dan Energi. McGraw-Hill Book Company, 2006.
MLA CitationWilliams, Eleanor R. Ekonomi Sumber Daya Mineral Dan Energi. McGraw-Hill Book Company, 2006.
Warning: These citations may not always be 100% accurate.