572691 Harper, R. (2013). Practical foundations for programming languages. Cambridge : Cambridge University Press.
芝加哥风格引文572691 Harper, Robert. Practical Foundations for Programming Languages. Cambridge : Cambridge University Press, 2013.
MLA引文572691 Harper, Robert. Practical Foundations for Programming Languages. Cambridge : Cambridge University Press, 2013.
警告：这些引文格式不一定是100％准确.