Many of these government resources do not show an author's name as a single person, or group of people. In those cases, you need to name the government agency or committee that is responsible for producing each document. There can be several groups associated with a single document. Sometimes a document cover only shows an agency's abbreviation or acronym, while further inside the report, the complete lengthy name & governmental hierarchy of the agency is revealed.
You need to be very careful in understanding the proper way to cite these underlying reports & documents.