Rensburg, W. v. (1978). Mineral-Supplies from South Africa: Their place in world resources. Economist Intelligence Unit.
Chicago-Zitierstil (17. Ausg.)Rensburg, William van. Mineral-Supplies from South Africa: Their Place in World Resources. London: Economist Intelligence Unit, 1978.
MLA-Zitierstil (9. Ausg.)Rensburg, William van. Mineral-Supplies from South Africa: Their Place in World Resources. Economist Intelligence Unit, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.