Sinaga, Lia Rosa Veronika, Henny Arwina Bangun, Jasmen Manurung, and Yuris R. A. Marbun. 2022. “The Effect of Audio Visual Media on the Knowledge and Attitudes of Mothers of Babies 0-24 Months About Giving Measles Booster Immunization in the Work Area of the Hutapaung Health Center in 2022”. TOUR HEALTH JOURNAL 1 (3):1-13. https://tourjurnal.akupuntour.com/index.php/tourhealthjournal/article/view/29.