The Journal of the American Society of Safety Engineers. American Society of Safety Professionals (ASSP).
Lua i Stíl Chicago (17ú heag.)The Journal of the American Society of Safety Engineers. American Society of Safety Professionals (ASSP).
Lua MLA (9ú heag.)The Journal of the American Society of Safety Engineers. American Society of Safety Professionals (ASSP).
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.