Lua APA (7ú heag.)

OPTNER,S.L. (1978). SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. PRENTICE HALL OF INDIA.

Lua i Stíl Chicago (17ú heag.)

OPTNER,S.L. SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. PRENTICE HALL OF INDIA, 1978.

Lua MLA (9ú heag.)

OPTNER,S.L. SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. PRENTICE HALL OF INDIA, 1978.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.