Gaya APA
Kellas, L., Lucantoni, P. (2009).
International English Coursebook 3 : Companion CD .
London ::
Hodder Education.
Gaya MLA
Kellas, Lydia., Lucantoni, Peter.
"International English Coursebook 3 : Companion CD".
London ::
Hodder Education,
2009.
Text.