APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.