Weiss, Rachel, and Arlene Archer. “A Social Semiotic Approach to Textbook Analysis: The Construction of the Discourses of Pharmacology”. Perspectives in Education 32, no. 3 (September 30, 2014): 118–130. Accessed May 3, 2024. https://journals.ufs.ac.za/index.php/pie/article/view/1876.