Hidayatullah AS, Trismawati T, Tjahjaningsih YS. Implementation of Interactive Digital Marketing with the 7P Marketing Concept to Increase Customer Interest on Fly Ash and Bottom Ash Products at PT PJB UP Paiton. PELS [Internet]. 2022Dec.22 [cited 2024Nov.21];30. Available from: https://pels.umsida.ac.id/index.php/PELS/article/view/1311