Ryken, L. (1987). Work and Leisure: In Christian perspective. Inter-Varsity.
芝加哥风格引文Ryken, Leland. Work and Leisure: In Christian Perspective. England: Inter-Varsity, 1987.
MLA引文Ryken, Leland. Work and Leisure: In Christian Perspective. Inter-Varsity, 1987.
警告：这些引文格式不一定是100％准确.