Buck, C. H. (1963). Problems of product design and development. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Buck, Christopher Hearn. Problems of Product Design and Development. Oxford: Pergamon Press, 1963.
Lua MLA (9ú heag.)Buck, Christopher Hearn. Problems of Product Design and Development. Pergamon Press, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.