Rosita, Silvia, Nanda Prasetya, Wahyu Dwi Susanti, Wan Rivaldo, Galang Aidil Akbar, Bagus Lindu Pamungkas, Christian Wibowo Trinugroho, and Ledy Elsera Astrianty. 2021. “Web Engineering to Develop Service Systems in Online Bookstores”. International Journal of Engineering Technology and Natural Sciences 3 (2), 89 - 94. https://doi.org/10.46923/ijets.v3i2.141.