Rámila Díaz, Noemi. “A Comparative study of native and non-native teachers’ scaffolding techniques in SLA at an early age”. Estudios Ingleses de la Universidad Complutense, vol. 17, vol. 17, 2009, pp. 57-73, https://revistas.ucm.es/index.php/EIUC/article/view/EIUC0909110057A.