Koenig, H. G. (1994). Aging and God: Spiritual pathways to mental health in midlife and later years. Haworth Pastoral Press.
Chicago-referens (17:e uppl.)Koenig, Harold George. Aging and God: Spiritual Pathways to Mental Health in Midlife and Later Years. New York: Haworth Pastoral Press, 1994.
MLA-referens (8:e uppl.)Koenig, Harold George. Aging and God: Spiritual Pathways to Mental Health in Midlife and Later Years. Haworth Pastoral Press, 1994.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.