Putri Kwarta, C. 2025. Improving Teenagers’ Knowledge and Attitudes Towards Anaemia and Blood Groups Through a Comprehensive Education Programme at Dr. Soetomo High School, Surabaya. Sinesia : Journal of Community Service. 2, 1 (Jun. 2025), 72–81. DOI:https://doi.org/10.69836/sinesia-jcs.v2i1.348.