Laetsch, W. M. (1969). The biological perspective: Introductory readings. Little.
芝加哥风格引文Laetsch, Watson M. The Biological Perspective: Introductory Readings. Boston: Little, 1969.
MLA引文Laetsch, Watson M. The Biological Perspective: Introductory Readings. Little, 1969.
警告：这些引文格式不一定是100％准确.