Chicago
Preface https://www.govinfo.gov/app/details/USREPORTS-26/USREPORTS-26-FrontMatter-2.
APA
Preface https://www.govinfo.gov/app/details/USREPORTS-26/USREPORTS-26-FrontMatter-2.
MLA
Preface. https://www.govinfo.gov/app/details/USREPORTS-26/USREPORTS-26-FrontMatter-2.
Bluebook
Preface.