See the APA Style website for Reports and Gray Literature examples:
https://apastyle.apa.org/style-grammar-guidelines/references/examples#textual-works
Basic Format:
Author, A. A., & Author, B. B. (Date). Title of the work. Source where you can retrieve the work. URL or DOI if available
1. Author(s). Note: List each author's last name and initials as Author, A. A., Author, B. B., & Author, C. C. If there is no author, spell out the name of the organization that published the report.
2. (Year, Month Date). Note: Provide as specific a date as is available.
3. Title of the report or document. Note: For works that stand alone (e.g. books, reports), italicize the title. Only capitalize the first word of the title and subtitle and any proper nouns.
4. Source. Includes the names of parent agencies or other organizations not listed in the group author name here.
5. URL
Dietary Guidelines Advisory Committee. 2020. Scientific Report of the 2020 Dietary Guidelines Advisory Committee: Advisory
Report to the Secretary of Agriculture and the Secretary of Health and Human Services. U.S. Department of Agriculture, Agricultural Research Service. https://www.dietaryguidelines.gov/2020-advisory-committee-report