1. Pressman, Roger S. 2002. Rekayasa Perangkat LunakPendekatan Praktisi (BUKU SATU). Yogyakarta: Penerbit Andi.
2. Digital Library – Universitas Komputer Indonesia [Internet], Retrieved June 7, 2020, from http://elib.unikom.ac.id/
3. Eprints – Universitas Sebelas Maret [Internet], Retrieved June 8, 2020, from http://eprints.uns.ac.id/
4. Unit Pelaksana Tes Potensi Akademik Bappenas [Internet], Retrieved June 8, 2020, from http://www.upp-tpa.com/
5. Memahami Ecommerce, e-book {Internet], Retrieved June 9, 2020, from http://kalamkata.com/