Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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