OBERG, Andrew. Comparison of the Effectiveness of a CALL-Based Approach and a Card-Based Approach to Vocabulary Acquisition and Retention. CALICO Journal, [S. l.], v. 29, n. 1, p. 118–144, 2013. DOI: 10.11139/cj.29.1.118-144. Disponível em: https://journal.equinoxpub.com/Calico/article/view/17080.. Acesso em: 21 may. 2024.