Khan, Aga, author
Simon & Schuster, 1954
Buku Teks
Osaka University,
Majalah, Jurnal, Buletin
Mahathir bin Mohamad, 1925-, author
MPH Group , 2012
Buku Teks
Kingston, Maxine Hong, author
Vintage Books, 1976
Buku Teks
Heleta, Savo, 1979- , author
American Management Association;, 2008
eBooks