Barbisan, C., Concari, L., Rodríguez, M., & Urrestarazu, J. (1985). Snap!: Activity Book 3. An English Course for Younger Learners (1a. ed.). Heinemann Educational Books.
Lua i Stíl Chicago (17ú heag.)Barbisan, C., L. Concari, M. Rodríguez, agus J. Urrestarazu. Snap!: Activity Book 3. An English Course for Younger Learners. 1a. ed. London: Heinemann Educational Books, 1985.
Lua MLA (9ú heag.)Barbisan, C., et al. Snap!: Activity Book 3. An English Course for Younger Learners. 1a. ed. Heinemann Educational Books, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.