Gaya APA

Ziogas, C. (2012). Economics : For the IB Diploma (Oxford IB Study Guides) 2nd edition (2). United Kingdom: Oxford University Press.

Gaya MLA

Ziogas, Consantine. "Economics : For the IB Diploma (Oxford IB Study Guides) 2nd edition". 2 United Kingdom: Oxford University Press, 2012. Text.