Dwivedi, A., & Gupta, G. (1993). Afforestation of arid lands. Scientific.
Lua i Stíl Chicago (17ú heag.)Dwivedi, A.P, agus G.N Gupta. Afforestation of Arid Lands. Jodhpur: Scientific, 1993.
Lua MLA (9ú heag.)Dwivedi, A.P, agus G.N Gupta. Afforestation of Arid Lands. Scientific, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.