Situmeang RR, Antoni A, Patricia J, Reinaldo D. The Influence of Service Quality, Distribution Channels, and Promotion on Sales Volume at PT Delta Agro Makmur Medan. Mantik [Internet]. 2020Aug.31 [cited 2026Apr.19];4(2):1356-60. Available from: https://iocscience.org/ejournal/index.php/mantik/article/view/950