APA
Hobson P. N., Summers R., . (1981). Methane production from agricultural and domestic wastes. London: Wiley.
Chicago
Hobson P N, Summers R, . 1981. Methane production from agricultural and domestic wastes. London: Wiley.
Harvard
Hobson P. N., Summers R., . (1981). Methane production from agricultural and domestic wastes. London: Wiley.
MLA
Hobson P N, Summers R, . Methane production from agricultural and domestic wastes. London: Wiley. 1981.