BOZNAK RUDOLPH G. (1997). COMPETITIVE PRODUCT DEVELOPMENT. OXFORD UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)BOZNAK RUDOLPH G. COMPETITIVE PRODUCT DEVELOPMENT. NEW DELHI: OXFORD UNIVERSITY PRESS, 1997.
Lua MLA (9ú heag.)BOZNAK RUDOLPH G. COMPETITIVE PRODUCT DEVELOPMENT. OXFORD UNIVERSITY PRESS, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.