APA
Harrison G., Octel & Harrison G. (1961). A coulometric analyser for the determination of traces of sulphur dioxide in air. London: Octel.
Chicago
Harrison G.F, Octel and Harrison G.F. 1961. A coulometric analyser for the determination of traces of sulphur dioxide in air. London: Octel.
Harvard
Harrison G., Octel and Harrison G. (1961). A coulometric analyser for the determination of traces of sulphur dioxide in air. London: Octel.
MLA
Harrison G.F, Octel and Harrison G.F. A coulometric analyser for the determination of traces of sulphur dioxide in air. London: Octel. 1961.