Perkins, D. (2002). Mineralogy (2nd ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Perkins, Dexter. Mineralogy. 2nd ed. Upper Saddle River, N.J: Prentice-Hall, 2002.
Lua MLA (9ú heag.)Perkins, Dexter. Mineralogy. 2nd ed. Prentice-Hall, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.