Eugene Ehrlich. (1987). Schaum's outline of theory and problems of punctuation, capitalization, and spelling. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoEugene Ehrlich. Schaum's Outline of Theory and Problems of Punctuation, Capitalization, and Spelling. New York: McGraw-Hill, 1987.
Dyfyniad MLAEugene Ehrlich. Schaum's Outline of Theory and Problems of Punctuation, Capitalization, and Spelling. New York: McGraw-Hill, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.