Yudina, Irina Aleksandrovna, Nariyana Vasilyevna Stepanova, and Agrafena Dmitriyevna Ivanova. 2019. “The Role of Parents in the Speech Therapy Work With Early Age Children Having Delay in Speech Development in a Bilingual Environment”. Amazonia Investiga 8 (21):408-19. https://amazoniainvestiga.info/index.php/amazonia/article/view/119.