APA Style
Worrall, M. (2005).
Oxford Ensiklopedi Pelajar Jilid 3 : El Salvador - Jeram .
London, UK:
Oxford University.
MLA Style
Worrall, Marry.
"Oxford Ensiklopedi Pelajar Jilid 3 : El Salvador - Jeram".
London, UK:
Oxford University,
2005.
Art Original.