Chicago
Memoranda
https://www.govinfo.gov/app/details/USREPORTS-73/USREPORTS-73-FrontMatter-5.
APA
Memoranda
https://www.govinfo.gov/app/details/USREPORTS-73/USREPORTS-73-FrontMatter-5.
MLA
Memoranda.
https://www.govinfo.gov/app/details/USREPORTS-73/USREPORTS-73-FrontMatter-5.
Bluebook
Memoranda.