Hutagalung, Inge, and Endriana Yuniartanti. “Implementasi Personal Selling Pembentukan Citra Produk PT. XYZ”. Warta Ikatan Sarjana Komunikasi Indonesia 1, no. 02 (December 9, 2018): 57–64. Accessed October 7, 2026. https://warta-iski.or.id/index.php/WartaISKI/article/view/18.