Cita APA (7a ed.)

Maidment, S., & Roberts, L. (2005). Happy Street: Class Book 1 (1a. ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Maidment, Stella, y Lorena Roberts. Happy Street: Class Book 1. 1a. ed. Oxford : New York: Oxford University Press, 2005.

Cita MLA (9a ed.)

Maidment, Stella, y Lorena Roberts. Happy Street: Class Book 1. 1a. ed. Oxford University Press, 2005.