Achmad Daengs, GS. “The Effect of Relationship Marketing Factors Toward Consumer Loyalty of PT. Astra International Tbk - Toyota Kijang Innova: Special on Commercial Car Category I in Surabaya”. EKONOMIKA45 :  Jurnal Ilmiah Manajemen, Ekonomi Bisnis, Kewirausahaan 1, no. 1 (December 1, 2013): 39–51. Accessed July 3, 2024. https://jurnaluniv45sby.ac.id/index.php/ekonomika/article/view/4.