Παραπομπή APA

Optner, S. L. (1965). Systems analysis for business and industrial problem solving. Prentice hall.

Παραπομπή Chicago Style

Optner, Stanford L. Systems Analysis for Business and Industrial Problem Solving. New Jersey: Prentice hall, 1965.

Παραπομπή MLA

Optner, Stanford L. Systems Analysis for Business and Industrial Problem Solving. Prentice hall, 1965.