Alouisius Freddy Kurnia Sandy and Yugi Setyarko, “Peran Relationship Marketing, Kualitas Pelayanan, dan Brand Attachment terhadap Loyalitas Anggota Koperasi Kredit Usaha Sejahtera di Cengkareng, Jakarta Barat”, Maeswara, vol. 4, no. 2, pp. 59–82, Apr. 2026.