Bucher, K., & Frey, M. (1994). Petrogenesis of metamorphic rocks (6th ed., complete revision of Winkler's textbook.). Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Bucher, Kurt, agus Martin Frey. Petrogenesis of Metamorphic Rocks. 6th ed., complete revision of Winkler's textbook. Berlin, New York: Springer-Verlag, 1994.
Lua MLA (9ú heag.)Bucher, Kurt, agus Martin Frey. Petrogenesis of Metamorphic Rocks. 6th ed., complete revision of Winkler's textbook. Springer-Verlag, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.