Merrick, Dave
Routledge, 1996
Buku Teks
Manalu, Sonniaty Natalya, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2006
UI - Tesis (Membership)
Davies, liz, author
Learning Matters Ltd., 2008
Buku Teks
Ratih Ramadhani, author
Universitas Indonesia, 2017
UI - Tesis (Membership)
Hall, Christopher, author
Routledge, 2006
Buku Teks