Singh Sheelwant. Vigyan Aur Pradyogiki ka Vikas (Hindi) Civil services main Examination (5th.). Mc Grow Hill Education (India).
Lua i Stíl Chicago (17ú heag.)Singh Sheelwant. Vigyan Aur Pradyogiki Ka Vikas (Hindi) Civil Services Main Examination. 5th. New Delhi: Mc Grow Hill Education (India).
Lua MLA (9ú heag.)Singh Sheelwant. Vigyan Aur Pradyogiki Ka Vikas (Hindi) Civil Services Main Examination. 5th. Mc Grow Hill Education (India).
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.