Mackey, A., & Gass, S. M. (2012). Research methods in second language acquisition: A practical guide. Wiley-Blackwell.
Lua i Stíl Chicago (17ú heag.)Mackey, Alison, agus Susan M. Gass. Research Methods in Second Language Acquisition: A Practical Guide. West Sussex, [Eng.]: Wiley-Blackwell, 2012.
Lua MLA (9ú heag.)Mackey, Alison, agus Susan M. Gass. Research Methods in Second Language Acquisition: A Practical Guide. Wiley-Blackwell, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.