APA-viite

Northcott, D. G. (1972). Introduction to homological algebra /. University Press.

Chicago-tyylinen lähdeviittaus

Northcott, D. G. Introduction to Homological Algebra /. Cambridge: University Press, 1972.

MLA-viite

Northcott, D. G. Introduction to Homological Algebra /. University Press, 1972.