Walker, R. (1988). The Cambridgeshire guide to historic buildings law ([New ed.].). Cambridge County Council.
芝加哥风格引文Walker, Robert. The Cambridgeshire Guide to Historic Buildings Law. [New ed.]. Cambridge: Cambridge County Council, 1988.
MLA引文Walker, Robert. The Cambridgeshire Guide to Historic Buildings Law. [New ed.]. Cambridge County Council, 1988.
警告：这些引文格式不一定是100％准确.