KEETON, W. T. (1980). Biological science.-- ed.3. W.W Norton and co.
芝加哥风格引文KEETON, William T. Biological Science.-- Ed.3. New York: W.W Norton and co, 1980.
MLA引文KEETON, William T. Biological Science.-- Ed.3. W.W Norton and co, 1980.
警告：这些引文格式不一定是100％准确.