David J. Sumanth. Productivity Engineering and Management: .. McGraw- Hill.
Čikaški stil citiranja (17. izdanje)David J. Sumanth. Productivity Engineering and Management: .. McGraw- Hill.
MLA način citiranja (8. izdanje)David J. Sumanth. Productivity Engineering and Management: .. McGraw- Hill.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.