SPENCE, A. P. (1999). Biology of human aging.-- Ed. 2. Prentice Hall.
芝加哥风格引文SPENCE, Alaxander P. Biology of Human Aging.-- Ed. 2. New Jersey: Prentice Hall, 1999.
MLA引文SPENCE, Alaxander P. Biology of Human Aging.-- Ed. 2. Prentice Hall, 1999.
警告：这些引文格式不一定是100％准确.