Marpaung, Lestin, et al. “THE CHILDREN’S ABILITY TO PRONOUNCE CAPITAL LETTERS IN WORDS AT THE AGE OF 2-3 YEARS IN KAMPUNG LALANG MEDAN”. ELT (English Language Teaching Prima Journal), vol. 4, no. 2, Dec. 2022, pp. 19-30, doi:10.34012/elt.v%vi%i.3209.