Ruegg, Rachael, and Cherie Brown. “Analysing the Effectiveness of Textbooks for Vocabulary Retention”. Vocabulary Learning and Instruction 3, no. 2 (December 31, 2014): 11–18. Accessed September 15, 2026. https://www.castledown.com/journals/vli/article/view/vli.v03.2.ruegg.brown.