Putri A.P., Suparno S., Issaliyeva S., Issaliyeva S., Retnawati H, Arpentieva M.R., и Kassymova G.K. 2020. «EFFECT OF PROBLEM BASED LEARNING MODELS ON THE ABILITY TO REMEMBER ENGLISH VOCABULARY IN PRESCHOOL». «Вестник НАН РК», вып. 3 (июнь):202-10. http://189185.vm7pq.group/bulletin-science/article/view/523.