Evans, Philip, author
Harvard Business School Press, 2000
Buku Teks
Fakultas Ilmu Komputer Universitas Indonesia, 2003
UI - Tesis (Membership)
Torr, Christopher, author
Westview Press, 1988
Buku Teks
Woodsworth, Anne, author
Gower, 1994
Buku Teks
Regina Lisa Firstia, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2020
UI - Tugas Akhir