Colin Lago, editor
McGraw-Hill, 2011
Buku Teks
Claringbull, Norman, author
Learning Matters, 2010
Buku Teks
Dadang Hawari, author
Balai Penerbit, 2010
Buku Teks
Deurzen-Smith, Emmy Van
Routledge, 1997
Buku Teks
Maguire, Marie
Routledge, 1995
Buku Teks