Schuster, E. H. (1965). Grammar, usage, and style. Webster Division, McGraw-Hill.
Dyfyniad Arddull ChicagoSchuster, Edgar Howard. Grammar, Usage, and Style. St. Louis: Webster Division, McGraw-Hill, 1965.
Dyfyniad MLASchuster, Edgar Howard. Grammar, Usage, and Style. Webster Division, McGraw-Hill, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.