Christie, L. (1987). Unsung heroes: How to recruit and train volunteer youth workers. Zondervan.
芝加哥风格引文Christie, Les. Unsung Heroes: How to Recruit and Train Volunteer Youth Workers. Grand Rapids: Zondervan, 1987.
MLA引文Christie, Les. Unsung Heroes: How to Recruit and Train Volunteer Youth Workers. Zondervan, 1987.
警告：这些引文格式不一定是100％准确.