Wulandari OPA, Pratiwi NMI, Nasution UCM. PENGARUH WORD OF MOUTH, SALES PROMOTION, DAN RELATIONSHIP MARKETING TERHADAP KEPUTUSAN PEMBELIAN DI DUNKIN DONUTS CABANG RUMAH SAKIT UNAIR SURABAYA. IJECEP [Internet]. 2024 Jun. 10 [cited 2025 Oct. 4];1(2):162-71. Available from: https://ijec.antispublisher.com/index.php/IJEC/article/view/25