Elva Rahmi Fitri (2023) “Gambier Marketing Strategy of Limapuluh Kota Regency (Case Study: Mr.Sabri’s Gambier Industry in Nagari Talang Maur, Mungka District)”, International Journal of Sciences: Basic and Applied Research (IJSBAR), 68(1), pp. 107–112. Available at: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/15599 (Accessed: 18 September 2025).