Cita APA (7th ed.)

Numrich, C. (1990). Face the issues: Intermediate listening and critical thinking skills. Addison-Wesley.

Cita Chicago (17th ed.)

Numrich, Carol. Face the Issues: Intermediate Listening and Critical Thinking Skills. Nueva York: Addison-Wesley, 1990.

Cita MLA (9th ed.)

Numrich, Carol. Face the Issues: Intermediate Listening and Critical Thinking Skills. Addison-Wesley, 1990.