1.
Zahra NAI, Karmila I, Karmila I, S YA, Ramadhan G, Najah RH, et al. Strategic Planning and Product Portfolio Development at Umrah Al Hijrah Travel Agents in the Era Digital Competition in the Surabaya Area. jbhi [Internet]. 2025 Jun. 29 [cited 2025 Jun. 29];2(4):10. Available from: https://economics.pubmedia.id/index.php/jbhi/article/view/777