Harlow, W. M., & Harrar, E. S. (1968). Textbook of dendrology: Covering the important forest trees of the United States and Canada (5th ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoHarlow, William Morehouse, and Ellwood S. Harrar. Textbook of Dendrology: Covering the Important Forest Trees of the United States and Canada. 5th ed. New York: McGraw-Hill, 1968.
Dyfyniad MLAHarlow, William Morehouse, and Ellwood S. Harrar. Textbook of Dendrology: Covering the Important Forest Trees of the United States and Canada. 5th ed. McGraw-Hill, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.