Cita APA (7th ed.)

OPTNER STANFORD L. (1977). SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT (3.). PRENTICE -HALL INTERNATIONAL, INC.

Cita Chicago (17th ed.)

OPTNER STANFORD L. SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. 3. NEW JERSEY,USA: PRENTICE -HALL INTERNATIONAL, INC, 1977.

Cita MLA (9th ed.)

OPTNER STANFORD L. SYSTEMS ANALYSIS FOR BUSINESS MANAGEMENT. 3. PRENTICE -HALL INTERNATIONAL, INC, 1977.