(2003). Polydron geometry set Polydron International Ltd. [kit].
Cita Chicago (17th ed.)Polydron Geometry Set Polydron International Ltd. [kit]. 2003.
Cita MLA (9th ed.)Polydron Geometry Set Polydron International Ltd. [kit]. 2003.
Atenció: Aquestes cites poden no estar 100% correctes.