Barnett, A., Pyle, L., & Subramanian, S. K. (1978). Biogas technology in the Third World: A multidisciplinary review. International Development Research Centre.
Chicago-viite (17. p.)Barnett, Andrew, Leo Pyle, ja S. K. Subramanian. Biogas Technology in the Third World: A Multidisciplinary Review. Canada: International Development Research Centre, 1978.
MLA-viite (8. p.)Barnett, Andrew, et al. Biogas Technology in the Third World: A Multidisciplinary Review. International Development Research Centre, 1978.
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