Gaya APA

Spargue, C, P, A, J. (2020). Theory of Knowledge : For the IB Diploma 4th edition (4). United Kingdom: Hodder Education.

Gaya MLA

Spargue, Carolyn, P.Henly, And, John. "Theory of Knowledge : For the IB Diploma 4th edition". 4 United Kingdom: Hodder Education, 2020. Text.