Puga , M. “PRONOMINAL VARIANTS - TU Y USTED - IN THE CONVERSATIONS OF THE SPEAKERS OF THE NGÄBE-BUGLE REGION, VERAGUAS PROVINCE, REPUBLIC OF PANAMA”. Revista Colegiada De Ciencia, vol. 4, no. 2, Apr. 2023, pp. 123-30, https://revistas.up.ac.pa/index.php/revcolciencia/article/view/3729.