Gaya APA

Dorton, J, B, A, I. (2020). Economics : Course Companion (Oxford IB Diploma Programme) 2020 Edition (2020). United Kingdom: Oxford University Press.

Gaya MLA

Dorton, Jocelyn, Blink, And, Ian. "Economics : Course Companion (Oxford IB Diploma Programme) 2020 Edition". 2020 United Kingdom: Oxford University Press, 2020. Text.