Northcott, D. G. (1973). A first course of homological algebra. Cambridge University Press.
芝加哥风格引文Northcott, D. G. A First Course of Homological Algebra. Londres: Cambridge University Press, 1973.
MLA引文Northcott, D. G. A First Course of Homological Algebra. Cambridge University Press, 1973.
警告：这些引文格式不一定是100％准确.