There is no universally accepted format for citing government documents, anymore than there is for any other source of information. The manuals listed below give examples of citations in various commonly used styles.
Citing Government Documents: American Psychological Association
Online samples of citations for selected types of government publications in APA style.
Citing Government Documents: American Political Science Association
Online samples of citations for selected types of government publications in APSA style.
Citing Government Documents: Chicago Manual
Provides general guidelines and specific examples for citing government information in Chicago style.
Citing Government Documents: Modern Language Association
Provides general guidelines and specific examples for citing government information in MLA style.
Citing Government Documents: Turabian
Provides general guidelines and specific examples for citing government information in Turabian style.