Romero Villarroel, Wilber, y Sara Camacho Estrada. 2017. «Phonological Interference from Kichwa and Spanish to English When Producing the /b/ /v/, /th/ /d/, /sh/ /ll/ Phonemes». Revista Publicando 4 (12 (1). "Quito, Ecuador":310-20. https://revistapublicando.org/revista/index.php/crv/article/view/661.