Green, N., Hartley, T. C., & Usher, J. A. (1991). The legal foundations of the single European market. Oxford University Press.
芝加哥风格引文Green, Nicholas, Trevor C. Hartley, 与 John A. Usher. The Legal Foundations of the Single European Market. Oxford: Oxford University Press, 1991.
MLA引文Green, Nicholas, et al. The Legal Foundations of the Single European Market. Oxford University Press, 1991.
警告：这些引文格式不一定是100％准确.