Citazione Stile APA (7a Edizione)
Keller, P. W. (1966). As a tree grows: Reflections on growing in the image of Christ. Billy Graham Evangelistic Association.
Citazione stile Chigago Style (17a edizione)
Keller, Phillip W. As a Tree Grows: Reflections on Growing in the Image of Christ. USA: Billy Graham Evangelistic Association, 1966.
Citatione MLA (9a ed.)
Keller, Phillip W. As a Tree Grows: Reflections on Growing in the Image of Christ. Billy Graham Evangelistic Association, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.