Holloway, Immy, author
Blackwell, 1997
Buku Teks
Murray-Smith, D.J., author
Chapman & Hall, 1995
Buku Teks
Elali, Taan S., author
CRC Press, Taylor and Francis Group, 2008
Buku Teks
Soliman, Samir S., author
Prentice-Hall, 1990
Buku Teks
Desiana Nurul Maftuhah, author
Universitas Indonesia, 2007
UI - Skripsi (Membership)