Martel, Cameron, and Rhona Lahey. “SEO for Your Optometry Practice: The Secret Sauce That Still Tastes Great in 2020”. Canadian Journal of Optometry 81, no. 4 (November 26, 2019): 69-70. Accessed February 28, 2020. https://openjournals.uwaterloo.ca/index.php/cjo/article/view/1584.