Kottmeyer, W. (1988). Basic goals in spelling. Webster Division, McGraw Hill.
Dyfyniad Arddull ChicagoKottmeyer, William. Basic Goals in Spelling. New York: Webster Division, McGraw Hill, 1988.
Dyfyniad MLAKottmeyer, William. Basic Goals in Spelling. Webster Division, McGraw Hill, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.