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.
Chicago-viite (17. p.)Urdiales Orellana, Vicente Fernando, ja 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.
MLA-viite (8. p.)Urdiales Orellana, Vicente Fernando, ja 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.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.