Department of Health (DoH, 1998) state that......
...(Department of Health (DoH), 1998).
DoH (1998) acknowledge that....
Note: A good tip if you are going to use the same citation a few times in your assignment is to use acronyms. You must explain the acronym in full the first time you use it, followed by the acronym so it is clear to your lecturer what the abbreviation stands for.
In print: Group Author (Year). Title (Report number). Source.
Online: Group Author. (Year). Title (Report number). Source. URL
Department for Education. (2017). Unlocking talent, fulfilling potential: A plan for improving social mobility through education (Cm 9541). https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/667690/Social_Mobility_Action _Plan_-_for_printing.pdf
Department of Health. (1998). Our healthier nation: A contract for health (Cm 3852). The Stationery Office.