Clarke de Armendo, R. (1958). English for secondary schools (14a. ed.). estrada.
Lua i Stíl Chicago (17ú heag.)Clarke de Armendo, Rosa. English for Secondary Schools. 14a. ed. Buenos Aires: estrada, 1958.
Lua MLA (9ú heag.)Clarke de Armendo, Rosa. English for Secondary Schools. 14a. ed. estrada, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.