Thrush, E. A., Baldwin, R., & Blass, L. (2002). Interactions access: Listening/Speaking (4th ed.). N.Y.: McGraw-Hill/Contemporary.
Chicago Style aipamenaThrush, Emily Austin., Robert Baldwin, và Laurie Blass. Interactions Access: Listening/Speaking. 4th ed. N.Y.: McGraw-Hill/Contemporary, 2002.
MLA aipamenaThrush, Emily Austin., Robert Baldwin, và Laurie Blass. Interactions Access: Listening/Speaking. 4th ed. N.Y.: McGraw-Hill/Contemporary, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.