Lua APA (7ú heag.)

Singleton, D., & Ryan, L. (2004). Language acquisition: The age factor (2nd ed.). Multilingual Matters Ltd..

Lua i Stíl Chicago (17ú heag.)

Singleton, David, agus Lisa Ryan. Language Acquisition: The Age Factor. 2nd ed. Clevedon: Multilingual Matters Ltd., 2004.

Lua MLA (9ú heag.)

Singleton, David, agus Lisa Ryan. Language Acquisition: The Age Factor. 2nd ed. Multilingual Matters Ltd., 2004.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.