Barclay, I. (2000). New product development a practice workbook for improving.
Lua i Stíl Chicago (17ú heag.)Barclay, Ian. New Product Development a Practice Workbook for Improving. Oxford, 2000.
Lua MLA (9ú heag.)Barclay, Ian. New Product Development a Practice Workbook for Improving. 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.