APA (7th ed.) Citation

Great Britain. Home Office & Great Britain. Scottish Office. (1991). Breathing apparatus (2nd ed.). H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. Home Office and Great Britain. Scottish Office. Breathing Apparatus. 2nd ed. London: H.M.S.O., 1991.

MLA (9th ed.) Citation

Great Britain. Home Office and Great Britain. Scottish Office. Breathing Apparatus. 2nd ed. H.M.S.O., 1991.

Warning: These citations may not always be 100% accurate.