Hoang Van Phong, Nguyen Ngoc Dung, Nguyen Thi Thu Huyen, Tran Thi Thu Trang4, Pham Tuan Viet, and Dao Anh Son. “ KNOWLEDGE AND ATTITUDE TOWARDS BLOOD DONATION OF PRESIDENTS AT CAT HAI AND BACH LONG VI ISLAND DISTRICTS AT HAI PHONG CITY IN 2019”. PalArch’s Journal of Archaeology of Egypt / Egyptology, vol. 18, no. 09, July 2021, pp. 538-47, https://www.archives.palarch.nl/index.php/jae/article/view/9337.