Schiff, J. (1991). HarperCollins resources for writing about literature. New York, N.Y: HarperCollins Publishers.
Dyfyniad Arddull ChicagoSchiff, Jeff. HarperCollins Resources for Writing About Literature. New York, N.Y: HarperCollins Publishers, 1991.
Dyfyniad MLASchiff, Jeff. HarperCollins Resources for Writing About Literature. New York, N.Y: HarperCollins Publishers, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.