Ahmad, Halimatun Saadiah, and Ayu Suzailiana Muhamad. “Effects of an Acute Bout of Exercise on Salivary Lactoferrin Responses Among Smokers and Non-Smokers”. Journal of Science and Technology, vol. 13, no. 1, Apr. 2021, pp. 12-17, https://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/7359.