Calkins, H. L. (1960). Master preachers: Their study and devotional habits. Review and Herald.
芝加哥风格引文Calkins, Harold L. Master Preachers: Their Study and Devotional Habits. Washington, D.C: Review and Herald, 1960.
MLA引文Calkins, Harold L. Master Preachers: Their Study and Devotional Habits. Review and Herald, 1960.
警告：这些引文格式不一定是100％准确.