Foster, R. J. (1989). Celebration of discipline: The path to spiritual growth: 25th anniversary edition. Harper San Francisco.
Chicago-čujuhus (17. p.)Foster, Richard J. Celebration of Discipline: The Path to Spiritual Growth: 25th Anniversary Edition. New York: Harper San Francisco, 1989.
MLA-čujuhus (9. p.)Foster, Richard J. Celebration of Discipline: The Path to Spiritual Growth: 25th Anniversary Edition. Harper San Francisco, 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.