Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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