Amsterdam : Elsevier Science Publishers
Majalah, Jurnal, Buletin
edited by Diana Crane
Routledge, 2002
Buku Teks
Regional English Language Office (RELO), 2009
Buku Referensi
Veronica Diptoadi, author
RELO public Affairs U.S. Embassy, 2009
Buku Teks
Erlinda Muslim, author
Fakultas Teknik Universitas Indonesia, 2014
UI - Laporan Penelitian