Grim, R. E. Applied clay mineralogy.
Lua i Stíl Chicago (17ú heag.)Grim, Ralph E. Applied Clay Mineralogy.
Lua MLA (8ú heag.)Grim, Ralph E. Applied Clay Mineralogy.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)