Cita APA (7th ed.)

Barbisan, C., Concari, L., Rodríguez, M., & Urrestarazu, J. (1985). Snap!: Activity Book 3. An English Course for Younger Learners (1a. ed.). Heinemann Educational Books.

Cita Chicago (17th ed.)

Barbisan, C., L. Concari, M. Rodríguez, i J. Urrestarazu. Snap!: Activity Book 3. An English Course for Younger Learners. 1a. ed. London: Heinemann Educational Books, 1985.

Cita MLA (9th ed.)

Barbisan, C., et al. Snap!: Activity Book 3. An English Course for Younger Learners. 1a. ed. Heinemann Educational Books, 1985.