Grubb, H. F., & Ryder, P. D. (1972). Effects of coal mining on the water resources of the Tradewater River Basin, Kentucky. United States Government Printing Office.
Chicago-Zitierstil (17. Ausg.)Grubb, Hayes F., und Paul D. Ryder. Effects of Coal Mining on the Water Resources of the Tradewater River Basin, Kentucky. Washington: United States Government Printing Office, 1972.
MLA-Zitierstil (9. Ausg.)Grubb, Hayes F., und Paul D. Ryder. Effects of Coal Mining on the Water Resources of the Tradewater River Basin, Kentucky. United States Government Printing Office, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.