Yuda Havid Yudistira and . W. Nela, “The Role of Communication and Mass Media in the Diffusion Process of the Covid-19 Vaccination Program Innovation: Peranan Komunikasi Dan Media Massa Dalam Proses Difusi Inovasi Program Vaksinasi Covid-19”, Kanal, vol. 10, no. 2, pp. 45–50, Mar. 2022.