Ihyak M. Strategi Public Relations Melalui Whatsapp Guna Mempromosikan Pondok Pesantren Asy-Syafi iyah Sukorejo Bangsalsari. mji [Internet]. 2023Dec.5 [cited 2024Jul.22];1(2):113-36. Available from: https://ejurnal.uij.ac.id/index.php/mji/article/view/2387