Chicago
Index to Volume 331 https://www.govinfo.gov/app/details/USREPORTS-331/USREPORTS-331-BackMatter-4.
APA
Index to Volume 331 https://www.govinfo.gov/app/details/USREPORTS-331/USREPORTS-331-BackMatter-4.
MLA
Index to Volume 331. https://www.govinfo.gov/app/details/USREPORTS-331/USREPORTS-331-BackMatter-4.
Bluebook
Index to Volume 331.