Cita APA (7th ed.)
Weyl, H., & Bechtolsheim, L. (1955). Symmetrie: Symmetry. [Deutsch]. Birkhäuser.
Cita Chicago (17th ed.)
Weyl, Hermann, i Lulu Bechtolsheim. Symmetrie: Symmetry. [Deutsch]. Basel, Stuttgart: Birkhäuser, 1955.
Cita MLA (9th ed.)
Weyl, Hermann, i Lulu Bechtolsheim. Symmetrie: Symmetry. [Deutsch]. Birkhäuser, 1955.
Atenció: Aquestes cites poden no estar 100% correctes.