Singh, R. B. (1974). Bio-gas plant: Generating methane from organic wastes. Gobar Gas Research Station.
Chicago (17e ed.) BronvermeldingSingh, Ram Bux. Bio-gas Plant: Generating Methane from Organic Wastes. Ajitmal, Etawah: Gobar Gas Research Station, 1974.
MLA (8e ed.) BronvermeldingSingh, Ram Bux. Bio-gas Plant: Generating Methane from Organic Wastes. Gobar Gas Research Station, 1974.
Let op: Deze citaties zijn niet altijd 100% accuraat.