Helmholz, R. H. (1990). Roman canon law in Reformation England (1. publ.). Cambridge University Press.
芝加哥风格引文Helmholz, Richard H. Roman Canon Law in Reformation England. 1. publ. Cambridge [u.a.]: Cambridge University Press, 1990.
MLA引文Helmholz, Richard H. Roman Canon Law in Reformation England. 1. publ. Cambridge University Press, 1990.
警告：这些引文格式不一定是100％准确.