APA (7th ed.) Citation

(1974). Sulphur dioxide SO 2 (Rev. and repr.). National Soc. for Clean Air.

Chicago Style (17th ed.) Citation

Sulphur Dioxide SO 2. Rev. and repr. Brighton: National Soc. for Clean Air, 1974.

MLA (9th ed.) Citation

Sulphur Dioxide SO 2. Rev. and repr. National Soc. for Clean Air, 1974.