Villanueva de Mayer, M. E. (1948). English for secondary: Second year book (1a. ed.). Tall. Gráf. Jorge Best.
Lua i Stíl Chicago (17ú heag.)Villanueva de Mayer, María Enriqueta. English for Secondary: Second Year Book. 1a. ed. Mendoza: Tall. Gráf. Jorge Best, 1948.
Lua MLA (9ú heag.)Villanueva de Mayer, María Enriqueta. English for Secondary: Second Year Book. 1a. ed. Tall. Gráf. Jorge Best, 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.