Morley, Michael, author
Palgrave, 2002
Buku Teks
Aisha Andari Rahmiputri, author
2016
UI - Skripsi (Membership)
Blau, Peter M., author
University of Chicago Press, 1957
Buku Teks
Sri Retna Astuti, author
BPNB DI Yogyakarta, 2016
Buku Teks
Puti Adella Elvina, author
Fakultas Ilmu Komputer Universitas Indonesia, 2013
UI - Tugas Akhir