Gaya APA
Lucantoni, P. et al (2006).
IGCSE English as a Second Language : Workbook (Cet 4).
United Kingdom:
Cambridge University.
Gaya MLA
Lucantoni, Peter. et al.
"IGCSE English as a Second Language : Workbook".
Cet 4
United Kingdom:
Cambridge University,
2006.
Text.