Cita APA

Roberts, L., & Lorena Roberts. (2003). Happy Street: Teacher's book. Oxford,New York: Oxford University Press.

Citación estilo Chicago

Roberts, Lorena, y Lorena Roberts. Happy Street: Teacher's Book. Oxford,New York: Oxford University Press, 2003.

Cita MLA

Roberts, Lorena, y Lorena Roberts. Happy Street: Teacher's Book. Oxford,New York: Oxford University Press, 2003.