Dyfyniad APA

Hair, D. (1963). Economic importance of timber in the United States. U.S. Department of Agriculture, Forest Service.

Dyfyniad Arddull Chicago

Hair, Dwight. Economic Importance of Timber in the United States. Washington: U.S. Department of Agriculture, Forest Service, 1963.

Dyfyniad MLA

Hair, Dwight. Economic Importance of Timber in the United States. U.S. Department of Agriculture, Forest Service, 1963.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.