Krishnan D. S. Cengage Foundation Series General Mental Ability. Cengage Learing India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Krishnan D. S. Cengage Foundation Series General Mental Ability. Delhi: Cengage Learing India Pvt. Ltd.
Lua MLA (9ú heag.)Krishnan D. S. Cengage Foundation Series General Mental Ability. Cengage Learing India Pvt. Ltd.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.