Παραπομπή APA

Armstrong ,M.A. (1988). Groups and Symmetry. Springer – Verlag.

Παραπομπή Chicago Style

Armstrong ,M.A. Groups and Symmetry. Springer – Verlag, 1988.

Παραπομπή MLA

Armstrong ,M.A. Groups and Symmetry. Springer – Verlag, 1988.