Cita APA (7th ed.)

Spratt, M. (1989). Tuning in (1a. ed.). Longman.

Cita Chicago (17th ed.)

Spratt, Mary. Tuning in. 1a. ed. Londres: Longman, 1989.

Cita MLA (9th ed.)

Spratt, Mary. Tuning in. 1a. ed. Longman, 1989.