Indriyani, D.A. dkk. 2025. Sustainable Marketing Strategy for Waste-Based Building Materials: Evidence from Clam Shell Ventilation Blocks in Coastal Surabaya. Improvement: Jurnal Manajemen dan Bisnis. 6, 2 (Sep 2025), 1–18. DOI:https://doi.org/10.30651/imp.v6i2.33667.