Najib tun Razak, author
Institut Terjemahan Negara Malaysia, 2011
Buku Teks
Miller, Johnm, author
Kogan Page, 1994
Buku Referensi
Artikel Jurnal
Taylor, Lawrence E., author
Little, Brown, 1981
Buku Teks
Criscito, Pat, author
Barron's Educational Series, Inc., 1999
Buku Referensi