Gaya APA
Titley, Brian. (2009).
Economics IGCSE Revision Guide .
:
.
Gaya Chicago
Titley, Brian.
Economics IGCSE Revision Guide.
:
,
2009.
Text.
Gaya MLA
Titley, Brian.
Economics IGCSE Revision Guide.
:
,
2009.
Text.
Gaya Turabian
Titley, Brian.
Economics IGCSE Revision Guide.
:
,
2009.
Print.