Gaya APA

WCJ., V, R. (1986). Strategic Minerals, Volume I : Major Mineral-Exporting Regions of The World . New Jersey: Prentice Hall Inc..

Gaya MLA

WCJ., Van, Rensburg,. "Strategic Minerals, Volume I : Major Mineral-Exporting Regions of The World". New Jersey: Prentice Hall Inc., 1986. Text.