SUSDARWONO, Endro Tri; SURAHMADI, Surahmadi. The Effectiveness of Promotional Tools in Making Covid-19 Vaccination a Success: Hypothesis Testing Methods for Changing Cochran’s Version. QISTINA: Jurnal Multidisiplin Indonesia, [S. l.], v. 1, n. 1, p. 22–30, 2022. DOI: 10.57235/qistina.v1i1.14. Disponível em: https://rayyanjurnal.com/index.php/qistina/article/view/14. Acesso em: 6 jun. 2026.