APA-referens

Optner, S. L. (1975). System analysis for business management (3rd ed.). Prentice-Hall of India.

Chicago-stil citat

Optner, Stanford L. System Analysis for Business Management. 3rd ed. New Jersey: Prentice-Hall of India, 1975.

MLA-referens

Optner, Stanford L. System Analysis for Business Management. 3rd ed. Prentice-Hall of India, 1975.

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