Bigelow, Martha, Anne Dahlman, and Susan Ranney. “Keeping the Language Focus in Content-Based ESL Instruction Through Proactive Curriculum-Planning”. TESL Canada Journal 24, no. 1 (October 1, 2006): 40–58. Accessed December 8, 2021. https://teslcanadajournal.ca/index.php/tesl/article/view/27.