GOFUR; MUYASAR, R. .; NURHASAN; FARISI, H. . The Influence of Price and Promotion on Sales Volume in a Printing Services Business. ENDLESS: INTERNATIONAL JOURNAL OF FUTURE STUDIES, [S. l.], v. 9, n. 2, p. 185–190, 2026. DOI: 10.54783/endlessjournal.v9i2.403. Disponível em: https://endless-journal.com/index.php/endless/article/view/403. Acesso em: 11 nov. 2026.