Gaya APA
Worral, M. (2002).
Oxford Ensiklopedia Pelajar Jilid 3 El Salvador - Jeram (Ed. 4).
Oxford:
Oxford University Press.
Gaya MLA
Worral, Mary.
"Oxford Ensiklopedia Pelajar Jilid 3 El Salvador - Jeram".
Ed. 4
Oxford:
Oxford University Press,
2002.
Text.