Barnett, A., Pyle, L., & Subramanian, S. K. (1978). Biogas technology in the Third World: A multidisciplinary review. International Development Research Centre.
Lua i Stíl Chicago (17ú heag.)Barnett, Andrew, Leo Pyle, agus S. K. Subramanian. Biogas Technology in the Third World: A Multidisciplinary Review. Canada: International Development Research Centre, 1978.
Lua MLA (8ú heag.)Barnett, Andrew, et al. Biogas Technology in the Third World: A Multidisciplinary Review. International Development Research Centre, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.