N. A. Khumairoh, W. Pramudiya, H. B. Amrullah, P. Puspasari, and A. Soraya, “Online Services Based On The Singa Karmila Application For Passport Processing At The Class I Immigration Checkpoint (Tpi) Malang Immigration Office”, PERCIPIENCE, vol. 1, no. 2, pp. 106–112, Mar. 2022.