APA-referens (7:e uppl.)
Keller, P. W. (1966). As a tree grows: Reflections on growing in the image of Christ. Billy Graham Evangelistic Association.
Chicago-referens (17:e uppl.)
Keller, Phillip W. As a Tree Grows: Reflections on Growing in the Image of Christ. USA: Billy Graham Evangelistic Association, 1966.
MLA-referens (9:e uppl.)
Keller, Phillip W. As a Tree Grows: Reflections on Growing in the Image of Christ. Billy Graham Evangelistic Association, 1966.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.