Berman, E., Lang, K., & Siniver, E. (2000). Language-skill complementarity: Returns to immigrant language acquisition. National Bureau of Economic Research.
Lua i Stíl Chicago (17ú heag.)Berman, Eli, Kevin Lang, agus Erez Siniver. Language-skill Complementarity: Returns to Immigrant Language Acquisition. Cambridge: National Bureau of Economic Research, 2000.
Lua MLA (9ú heag.)Berman, Eli, et al. Language-skill Complementarity: Returns to Immigrant Language Acquisition. National Bureau of Economic Research, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.