Nag, P. (1984). Census mapping surveying. Concept Publishing Company.
Lua i Stíl Chicago (17ú heag.)Nag, Prithivish. Census Mapping Surveying. New Delhi: Concept Publishing Company, 1984.
Lua MLA (9ú heag.)Nag, Prithivish. Census Mapping Surveying. Concept Publishing Company, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.