Regis, R. (1996). Understanding crystal power (Rev. ed.). InterShelf Foundation.
Cita Chicago (17th ed.)Regis, Riza. Understanding Crystal Power. Rev. ed. Manila: InterShelf Foundation, 1996.
Cita MLA (9th ed.)Regis, Riza. Understanding Crystal Power. Rev. ed. InterShelf Foundation, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.