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Lua i Stíl Chicago (17ú heag.)GRINALDI JOHN V. SAFETY MANAGEMENT. 5. DELHI: RICHARD D.IRWIN INC, 1989.
Lua MLA (9ú heag.)GRINALDI JOHN V. SAFETY MANAGEMENT. 5. RICHARD D.IRWIN INC, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.