G. Ganefri, E. Erianjoni, M. Hasmira, A. Hadi, A. Yusra, and T. Santi, “Informative Nagari based on Android and IoS in Nagari VII Koto Talago, Guguk Sub-district, Limapuluh Kota Regency”, SENJOP, vol. 5, no. 1, pp. 57-61, Dec. 2022.