Kingsman, B. G. (1985). Raw Materials Purchasing. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Kingsman, B. G. Raw Materials Purchasing. ELSEVIER, 1985.
Lua MLA (8ú heag.)Kingsman, B. G. Raw Materials Purchasing. ELSEVIER, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.