GOPALKRISHNAN P. (1982). MATERIALS MANAGEMENT.AN INTREGRATED APPROACH. PRENTICE -HALL INTERNATIONAL, INC.
Lua i Stíl Chicago (17ú heag.)GOPALKRISHNAN P. MATERIALS MANAGEMENT.AN INTREGRATED APPROACH. NEW JERSEY,USA: PRENTICE -HALL INTERNATIONAL, INC, 1982.
Lua MLA (9ú heag.)GOPALKRISHNAN P. MATERIALS MANAGEMENT.AN INTREGRATED APPROACH. PRENTICE -HALL INTERNATIONAL, INC, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.