Johnson, P. (2006). Business economics F.Y.B.Com (2nd rev.). Manan Prakashan.
Lua i Stíl Chicago (17ú heag.)Johnson, P.A. Business Economics F.Y.B.Com. 2nd rev. Mumbai: Manan Prakashan, 2006.
Lua MLA (9ú heag.)Johnson, P.A. Business Economics F.Y.B.Com. 2nd rev. Manan Prakashan, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.