Tanka, J., & Most, P. (1990). Interactions 1: A listening / speaking skills book (2nd ed.). New York: McGraw-Hill publishing company.
Dyfyniad Arddull ChicagoTanka, Judith, và Paul Most. Interactions 1: A Listening / Speaking Skills Book. 2nd ed. New York: McGraw-Hill publishing company, 1990.
Dyfyniad MLATanka, Judith, và Paul Most. Interactions 1: A Listening / Speaking Skills Book. 2nd ed. New York: McGraw-Hill publishing company, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.