APA (7th ed.) Citation

Northcott, D. G. (1960). An introduction to homological algebra. University Press.

Chicago Style (17th ed.) Citation

Northcott, D. G. An Introduction to Homological Algebra. Cambridge: University Press, 1960.

MLA (9th ed.) Citation

Northcott, D. G. An Introduction to Homological Algebra. University Press, 1960.