Command paper

Government department/committee/organisation. Title. (Command no.). Place of publication: Publisher, year.

Command papers are published by The Stationery Office whose headquarters are based in London. Before 1963 the Stationery Office was referred to as HMSO. 

Example:

Home Office.  Identity cards: the next steps. (Cm.6020). London: The Stationery Office, 2003.

Make use you use the correct abbreviation of Command, as this varies for different historical periods.

Online command paper

If you are referencing a command paper you found online, this should be indicated in the reference.

Government department/committee/organisation. Title. (Command no.). [Online]. Place of publication: Publisher, year. [Date accessed]. Available from: URL

Example:

Department for Education. Unlocking talent, fulfilling potential: a plan for improving social mobility through education. (Cm.9541). [Online]. London: The Stationery Office, 2017. [Accessed 15 May 2018]. Available from: https://0-www-publicinformationonline-com.wam.leeds.ac.uk/