Tata Heru Prabawa 2026. Green Branding and Maritime Service Marketing: How Environmental Certification Shapes Customer Loyalty and Competitive Positioning Among Global Shipping Companies. MANABIS: Jurnal Manajemen dan Bisnis. 5, 2 (Jun. 2026), 400–407. DOI:https://doi.org/10.54259/manabis.v5i2.7276.