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: Penerapan Interactive Digital Marketing Dengan Konsep 7P Marketing Untuk Menaikkan Customer Interest Produk Fly Ash dan Bottom Ash di PT PJB UPPaiton. PELS [Internet]. 2022 Dec. 22 [cited 2026 Oct. 26];3. Available from: https://pels.umsida.ac.id/index.php/PELS/article/view/1311