Werner, P. K. (1997). Interactions access: A communicative grammar. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoWerner, Patricia K. Interactions Access: A Communicative Grammar. New York: McGraw-Hill, 1997.
Dyfyniad MLAWerner, Patricia K. Interactions Access: A Communicative Grammar. New York: McGraw-Hill, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.