Young, S. L. (2011). Craving earth: Understanding pica : the urge to eat clay, starch, ice, and chalk. Columbia University Press.
芝加哥风格引文Young, Sera L. Craving Earth: Understanding Pica : The Urge to Eat Clay, Starch, Ice, and Chalk. New York: Columbia University Press, 2011.
MLA引文Young, Sera L. Craving Earth: Understanding Pica : The Urge to Eat Clay, Starch, Ice, and Chalk. Columbia University Press, 2011.
警告：这些引文格式不一定是100％准确.