Pratolo B, Hafizhah R. The effectiveness of using crossword puzzle games to improve vocabulary mastery of the 7th grade students of SMP Muhammadiyah 2 Kalasan. Teach English as a Foreign Lang.  J. [Internet]. 2022Nov.9 [cited 2024Apr.26];1(1):1-12. Available from: http://journal1.uad.ac.id/index.php/tefl/article/view/161