APA (7th ed.) Citation

Hu, S. Z. (1959). Homotopy theory / by S.Z. Hu. Academic.

Chicago Style (17th ed.) Citation

Hu, S. Z. Homotopy Theory / by S.Z. Hu. Academic, 1959.

MLA (9th ed.) Citation

Hu, S. Z. Homotopy Theory / by S.Z. Hu. Academic, 1959.

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