Chicago
Memoranda https://www.govinfo.gov/app/details/USREPORTS-99/USREPORTS-99-FrontMatter-3.
APA
Memoranda https://www.govinfo.gov/app/details/USREPORTS-99/USREPORTS-99-FrontMatter-3.
MLA
Memoranda. https://www.govinfo.gov/app/details/USREPORTS-99/USREPORTS-99-FrontMatter-3.
Bluebook
Memoranda.