Cita APA (7th ed.)

Carrier, M., Haines, S., & David, C. Break into english. Teacher´s book 1.

Cita Chicago (17th ed.)

Carrier, Michael, Simon Haines, i Christian David. Break into English. Teacher´s Book 1.

Cita MLA (8th ed.)

Carrier, Michael, et al. Break into English. Teacher´s Book 1.