Lua APA (7ú heag.)
Singleton, D. M., & Ryan, L. (2004). Language acquisition: The age factor (2nd ed.). Multilingual Matters.
Lua i Stíl Chicago (17ú heag.)
Singleton, D. M., agus Lisa Ryan. Language Acquisition: The Age Factor. 2nd ed. Clevedon ; Buffalo: Multilingual Matters, 2004.
Lua MLA (9ú heag.)
Singleton, D. M., agus Lisa Ryan. Language Acquisition: The Age Factor. 2nd ed. Multilingual Matters, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.