Citazione Stile APA (7a Edizione)

Cohen, M. M. (1973). A course in simple homotopy theory. Springer-Verlag.

Citazione stile Chigago Style (17a edizione)

Cohen, M. M. A Course in Simple Homotopy Theory. Nueva York: Springer-Verlag, 1973.

Citatione MLA (9a ed.)

Cohen, M. M. A Course in Simple Homotopy Theory. Springer-Verlag, 1973.