Cita APA (7a ed.)

(2006). All clear: Listening and speaking (2nd ed.). Heinle CENGAGE Learning.

Cita Chicago Style (17a ed.)

All Clear: Listening and Speaking. 2nd ed. Boston: Heinle CENGAGE Learning, 2006.

Cita MLA (8a ed.)

All Clear: Listening and Speaking. 2nd ed. Heinle CENGAGE Learning, 2006.