SEHGAL, P. (1982). Design of irrigation structures. Khana.
Lua i Stíl Chicago (17ú heag.)SEHGAL, P.P. Design of Irrigation Structures. New Delhi: Khana, 1982.
Lua MLA (9ú heag.)SEHGAL, P.P. Design of Irrigation Structures. Khana, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.