Werner, P. K. (2007). Interactions 2: Grammar. New York: McGraw-Hill Contemporary.
Dyfyniad Arddull ChicagoWerner, Patricia K. Interactions 2: Grammar. New York: McGraw-Hill Contemporary, 2007.
Dyfyniad MLAWerner, Patricia K. Interactions 2: Grammar. New York: McGraw-Hill Contemporary, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.