Into that darkness : : from mercy killing to mass murder.

MLA

Sereny, Gitta. Into That Darkness : From Mercy Killing to Mass Murder. London: PIMLICO, 1995.

APA

Sereny, G. (1995). Into that darkness : from mercy killing to mass murder. London: PIMLICO.

Chicago

Sereny, Gitta Into That Darkness: From Mercy Killing to Mass Murder. London: PIMLICO, 1995.