APA Style

HEYDORN, W., JESUDASON, S. (2020). Theory of Knowledge for the IB Diploma Course Guide 3rd edition (3rd edition). United Kingdom: Cambridge University Press.

MLA Style

HEYDORN, Wendy., JESUDASON, Susan. "Theory of Knowledge for the IB Diploma Course Guide 3rd edition". 3rd edition United Kingdom: Cambridge University Press, 2020. Text.