APA (7th ed.) Citation

Hilton, P. J. (1953). An introduction to homotopy theory. University Press.

Chicago Style (17th ed.) Citation

Hilton, Peter John. An Introduction to Homotopy Theory. Cambridge: University Press, 1953.

MLA (8th ed.) Citation

Hilton, Peter John. An Introduction to Homotopy Theory. University Press, 1953.