Cita APA (7a ed.)

Whitehead, G. W. (1978). Elements of homotopy theory. Springer-Verlag.

Cita Chicago Style (17a ed.)

Whitehead, George W. Elements of Homotopy Theory. New York: Springer-Verlag, 1978.

Cita MLA (8a ed.)

Whitehead, George W. Elements of Homotopy Theory. Springer-Verlag, 1978.