Gaya APA

Titley, B., Moynihan, S, D. (2018). Complete Economics for Cambridge IGCSE & O Level : Third Edition (3rd edition). United Kingdom: Oxford University Press.

Gaya MLA

Titley, Brian., Moynihan, Sir, Dan. "Complete Economics for Cambridge IGCSE & O Level : Third Edition". 3rd edition United Kingdom: Oxford University Press, 2018. Text.