The APA Style page (for the 7th edition) maintains numerous reference examples, including one how to cite a Report by a Government Agency References. The notable change from the 6th edition is that the title of the page is italicized (like a book title). The page also notes:

The specific agency responsible for the report appears as the author. The names of parent agencies not present in the group author name appear in the source element as the publisher. This creates concise in-text citations and complete reference list entries.

Additional resources with  formatting tips include:

• Guide to What's New in the Publication Manual of the American Psychological Association, Seventh Edition
• APA Citation Style, 7th edition: Government Document (Himmelfarb Health Sciences Library) (in-text or parenthetical citation)