Halliday, M.A.K., author
Oxford University Press, 1989
Buku Teks
Weatherall, Ann, 1964-, author
Routledge, 2002
Buku Teks
Masad, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
UI - Tesis (Membership)
Cambridge University Press, 1982
eBooks
Dedi Sofyan, author
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2006
UI - Tesis (Membership)