Dwiana Hercahyani, author
Universitas Indonesia, 2008
UI - Tesis (Open)
Osborne, Milton
Allen & Uwin, 1994
Buku Teks
Modupe, Prince
Harcourt Brace , 1957
Buku Teks
Machiavelli, Niccolo, author
Modern Library, 1950
Buku Teks
Shakespeare, Warwick, author
Blackie & Son, [date of publication not identified]
Buku Teks