APA aipamena

Knight, G. R. (2001). I Used to be Perfect: A study of sin and salvation (2ª edición.). Andrews University Press.

Chicago Style aipamena

Knight, George R. I Used to Be Perfect: A Study of Sin and Salvation. 2ª edición. Berrien Springs, Michigan: Andrews University Press, 2001.

MLA aipamena

Knight, George R. I Used to Be Perfect: A Study of Sin and Salvation. 2ª edición. Andrews University Press, 2001.