APA (7th ed.) Citation

Marquis, D. B. (2010). Four Versions of Double Effect. The doctrine of double effect, 156-188.

Chicago Style (17th ed.) Citation

Marquis, Donald B. "Four Versions of Double Effect." The Doctrine of Double Effect 2010: 156-188.

MLA (9th ed.) Citation

Marquis, Donald B. "Four Versions of Double Effect." The Doctrine of Double Effect, 2010, pp. 156-188.

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