Fathur Rokhman, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1996
UI - Tesis (Membership)
Ismail Fajar, author
2018
UI - Skripsi (Membership)
edited by Howard Giles and W. Peter Robinson
John Wiley & Sons, 1990
Buku Referensi
Montgomery, Martin, author
Routledge, Taylor & Francis Group, 2008
Buku Teks
Montgomery, Martin, author
Routledge , 1996
Buku Teks