APA-referens

Heidmann, J. (1980). Relativistic cosmology: An introduction. Springer-Verlag.

Chicago-stil citat

Heidmann, Jean. Relativistic Cosmology: An Introduction. Berlin: Springer-Verlag, 1980.

MLA-referens

Heidmann, Jean. Relativistic Cosmology: An Introduction. Springer-Verlag, 1980.