Clapham, W. B. (1981). Human ecosystems. Macmillan.
芝加哥风格引文Clapham, Wentworth B. Human Ecosystems. New York: Macmillan, 1981.
MLA引文Clapham, Wentworth B. Human Ecosystems. Macmillan, 1981.
警告：这些引文格式不一定是100％准确.
APA引文
Clapham, W. B. (1981). Human ecosystems. Macmillan.
芝加哥风格引文Clapham, Wentworth B. Human Ecosystems. New York: Macmillan, 1981.
MLA引文Clapham, Wentworth B. Human Ecosystems. Macmillan, 1981.