Hummel, K. M. (2014). Introducing second language acquisition: Perspectives and practices. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Hummel, Kirsten M. Introducing Second Language Acquisition: Perspectives and Practices. Chichester, West Sussex: John Wiley & Sons, 2014.
Lua MLA (9ú heag.)Hummel, Kirsten M. Introducing Second Language Acquisition: Perspectives and Practices. John Wiley & Sons, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.