Bielak J, Pawlak M, Mystkowska-Wiertelak A. Teaching the English active and passive voice with the help of cognitive grammar: An empirical study. 10.14746/ssllt [Internet]. 2013 Oct. 1 [cited 2024 May 4];3(4):581-619. Available from: https://pressto.amu.edu.pl/index.php/ssllt/article/view/5026