Citazione Stile APA (7a Edizione)

Johannson, K. (1979). Homotopy equivalences of 3-manifolds with boundaries. Springer-Verlag.

Citazione stile Chigago Style (17a edizione)

Johannson, Klaus. Homotopy Equivalences of 3-manifolds with Boundaries. Berlín: Springer-Verlag, 1979.

Citatione MLA (9a ed.)

Johannson, Klaus. Homotopy Equivalences of 3-manifolds with Boundaries. Springer-Verlag, 1979.