APA (7th ed.) Citation

Hilton, P. J. (1953). An introduction to homotopy theory. Cambridge University Press. https://doi.org/10.1017/CBO9780511666278

Chicago Style (17th ed.) Citation

Hilton, Peter John. An Introduction to Homotopy Theory. Cambridge: Cambridge University Press, 1953. https://doi.org/10.1017/CBO9780511666278.

MLA (9th ed.) Citation

Hilton, Peter John. An Introduction to Homotopy Theory. Cambridge University Press, 1953. https://doi.org/10.1017/CBO9780511666278.