Hera Lestari Mikarsa, author
1992
UI - Tesis (Membership)
Schickedanz, Judith A
Little, Brown & Co., 1982
Buku Teks
Smith, Peter K., author
Wiley, 2011
Buku Teks
edited by Andrew Ballantyne
Routledge, 2010
Buku Teks
Tomlinson, Carl M., author
Allyn and Bacon, 2002
Buku Referensi