Cita APA (7th ed.)

Northcott, D. G. (1972). An introduction to homological algebra. Cambridge University.

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

Northcott, D. G. An Introduction to Homological Algebra. Cambridge University, 1972.