Kasri Astuti and Rahmania Ambarika 2022. Effectiveness of the “Ular Tangga” Method Against the Motivation and Activeness of the Class of Pregnant Women in Ngepoh Village Dringu Sub District, Probolinggo Regency. Journal for Quality in Public Health. 6, 1 (Nov. 2022), 68–75. DOI:https://doi.org/10.30994/jqph.v6i1.405.