Johnson, P. (2008). Business economics I F.Y.B.Com. Manan Prakashan.
Lua i Stíl Chicago (17ú heag.)Johnson, P. Business Economics I F.Y.B.Com. Mumbai: Manan Prakashan, 2008.
Lua MLA (9ú heag.)Johnson, P. Business Economics I F.Y.B.Com. Manan Prakashan, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.