Urdiales Orellana, V. F., & León Vélez, M. V. (2013). Developing english vocabulary through the use of songs in students of fourth level of Basic Education at “Unidad Educativa Fiscomisional Don Bosco.
Lua i Stíl Chicago (17ú heag.)Urdiales Orellana, Vicente Fernando, agus María Verónica León Vélez. Developing English Vocabulary Through the Use of Songs in Students of Fourth Level of Basic Education at “Unidad Educativa Fiscomisional Don Bosco. 2013.
Lua MLA (8ú heag.)Urdiales Orellana, Vicente Fernando, agus María Verónica León Vélez. Developing English Vocabulary Through the Use of Songs in Students of Fourth Level of Basic Education at “Unidad Educativa Fiscomisional Don Bosco. 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.