APA (7th ed.) Citation

Irvine, I. (1999). Acedia, Tristitia and Sloth: Early Christian Forerunners to Chronic Ennui.

Chicago Style (17th ed.) Citation

Irvine, Ian. Acedia, Tristitia and Sloth: Early Christian Forerunners to Chronic Ennui. 1999.

MLA (9th ed.) Citation

Irvine, Ian. Acedia, Tristitia and Sloth: Early Christian Forerunners to Chronic Ennui. 1999.

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