Suprayogi, Heru. “The Effectivenes of Scrabble Game for Students’ Spelling Mastery in Vocabulary Learning for Seventh Graders of Smp Muhammadiyah Surabaya”. Tell : Teaching of English Language and Literature Journal, vol. 4, no. 2, July 2016, pp. 81-90, doi:10.30651/tell.v4i2.2102.