Victoria Wai Lan Yeung, Pui Chuen Tam, and Eric Kenson Yau. “The Relative Effectiveness of Altruistic Vs. Egoistic Messages in Influencing Non-donors’ Intention to Donate Blood in Hong Kong”. Journal of Social Psychology Research 1, no. 2 (June 23, 2022): 97–110. Accessed May 6, 2024. https://ojs.wiserpub.com/index.php/JSPR/article/view/1313.