APA (7th ed.) Citation

Figueiredo, L. C. d., Silveira, M. d. F., & Guedes, A. P. (1993). Let's speak English: Book 4. Ática W. Roth.

Chicago Style (17th ed.) Citation

Figueiredo, Luciane Cassela de, Marília de Figueiredo Silveira, and Avelino Pereira Guedes. Let's Speak English: Book 4. São Paulo, SP: Ática W. Roth, 1993.

MLA (9th ed.) Citation

Figueiredo, Luciane Cassela de, et al. Let's Speak English: Book 4. Ática W. Roth, 1993.