Setiawati, N. A., N. Nandang, and N. N. . Rachmani. “The Influence of Marketing Mix on Purchase Decision in the Kiyoptiykey Entrusted Service”. TOFEDU: The Future of Education Journal, vol. 4, no. 9, Dec. 2025, pp. 5428-34, doi:10.61445/tofedu.v4i9.1230.