Lua APA (7ú heag.)
ebrary, Inc, & Herrmann, K. (2011). Hardness testing: Principles and applications. ASM International.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus Konrad Herrmann. Hardness Testing: Principles and Applications. Materials Park, Ohio: ASM International, 2011.
Lua MLA (9ú heag.)
ebrary, Inc, agus Konrad Herrmann. Hardness Testing: Principles and Applications. ASM International, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.