Cita APA

Nunan, D. 1., & Nunan, D. 1. (1999). Go for it!: Book 1. Boston, Massachusetts: Heinle & Heinle.

Citación estilo Chicago

Nunan, David 1949-, y David 1949- Nunan. Go for It!: Book 1. Boston, Massachusetts: Heinle & Heinle, 1999.

Cita MLA

Nunan, David 1949-, y David 1949- Nunan. Go for It!: Book 1. Boston, Massachusetts: Heinle & Heinle, 1999.