OPTNER,S.L. (1978). SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. PRENTICE HALL OF INDIA.
Čikaški stil citiranja (17. izdanje)OPTNER,S.L. SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. PRENTICE HALL OF INDIA, 1978.
MLA način citiranja (9. izdanje)OPTNER,S.L. SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. PRENTICE HALL OF INDIA, 1978.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.