Chang, Yung-Chia, and Li-Chun Huang. “The Effect of Product Knowledge and Risk Perception on Consumers’ Online Word-of -Mouth Search Behavior for the Bio-Agricultural Products–in the Case of Ganoderma Dietary Supplements”. International Journal of Environment, Agriculture and Biotechnology, vol. 4, no. 2, Oct. 2019, https://journal-repository.com/index.php/ijeab/article/view/468.