Eckholm, E. P. (1977). The picture of health: Environmental sources of disease (First edition.). Norton.
芝加哥风格引文Eckholm, Erik P. The Picture of Health: Environmental Sources of Disease. First edition. New York: Norton, 1977.
MLA引文Eckholm, Erik P. The Picture of Health: Environmental Sources of Disease. First edition. Norton, 1977.
警告：这些引文格式不一定是100％准确.