Garrett, Gill, author
Macmillan, 1983
Buku Teks
Mickey, Stanley, author
Davis, 1999
Buku Teks
Golant, Stephen M., author
John Wiley & Sons, 1979
Buku Teks
Koller, Marvin R
Random House, 1968
Buku Teks
Tri Budi Wahyuni Rahardjo, editor
UI-Press, 2001
UI - Pidato