APA-referens (7:e uppl.)

Christie, L. (1987). Unsung heroes: How to recruit and train volunteer youth workers. Zondervan.

Chicago-referens (17:e uppl.)

Christie, Les. Unsung Heroes: How to Recruit and Train Volunteer Youth Workers. Grand Rapids: Zondervan, 1987.

MLA-referens (9:e uppl.)

Christie, Les. Unsung Heroes: How to Recruit and Train Volunteer Youth Workers. Zondervan, 1987.