NISSENBERG, G. (2020). Complte Spanish grammar. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)NISSENBERG, Gilda. Complte Spanish Grammar. McGraw Hill, 2020.
Lua MLA (9ú heag.)NISSENBERG, Gilda. Complte Spanish Grammar. McGraw Hill, 2020.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.