APA (7th ed.) Citation

Evans, G. (1978). Duo Principia: An Old Problem Rediscovered. Christians, Philosophers and Heretics in Twelfth Century.

Chicago Style (17th ed.) Citation

Evans, Gillian. Duo Principia: An Old Problem Rediscovered. Christians, Philosophers and Heretics in Twelfth Century. 1978.

MLA (9th ed.) Citation

Evans, Gillian. Duo Principia: An Old Problem Rediscovered. Christians, Philosophers and Heretics in Twelfth Century. 1978.

Warning: These citations may not always be 100% accurate.