Dyfyniad APA
Harvey, C. E. (1986). Coal in Appalachia: An economic analysis. The University Press of Kentucky.
Dyfyniad Arddull Chicago
Harvey, Curtis E. Coal in Appalachia: An Economic Analysis. Lexington, Kentucky: The University Press of Kentucky, 1986.
Dyfyniad MLA
Harvey, Curtis E. Coal in Appalachia: An Economic Analysis. The University Press of Kentucky, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.