APA (7th ed.) Citation

Sereny. (1974). Into that darkness: From mercy killing to mas murder. Andre Deutsch.

Chicago Style (17th ed.) Citation

Sereny. Into That Darkness: From Mercy Killing to Mas Murder. London: Andre Deutsch, 1974.

MLA (8th ed.) Citation

Sereny. Into That Darkness: From Mercy Killing to Mas Murder. Andre Deutsch, 1974.

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