Werner, P. K., Lida R. Baker, & Mary Mitchell Church. (1990). Interactions 2: A communicative grammar (2nd ed.). New York: McGraw - Hill, Inc.
Dyfyniad Arddull ChicagoWerner, Patricia K., Lida R. Baker, và Mary Mitchell Church. Interactions 2: A Communicative Grammar. 2nd ed. New York: McGraw - Hill, Inc, 1990.
Dyfyniad MLAWerner, Patricia K., Lida R. Baker, và Mary Mitchell Church. Interactions 2: A Communicative Grammar. 2nd ed. New York: McGraw - Hill, Inc, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.