Cita APA (7a ed.)

Figueiredo, L. C. d., Silveira, M. d. F., & Guedes, A. P. (1994). Let's speak English: Book 4 (3.ed.). Ática W. Roth.

Cita Chicago Style (17a ed.)

Figueiredo, Luciane Cassela de, Marília de Figueiredo Silveira, y Avelino Pereira Guedes. Let's Speak English: Book 4. 3.ed. São Paulo, SP: Ática W. Roth, 1994.

Cita MLA (9a ed.)

Figueiredo, Luciane Cassela de, et al. Let's Speak English: Book 4. 3.ed. Ática W. Roth, 1994.