For example, to find the Affordable Care Act, you could submit an Advanced Search like the following:
You would then yield your desired search result:
You can select the Citation Navigator either from below the main search bar, or from the Advanced Search page. Once in the navigator, you can create a citation by filling in the volume and page and selecting either Stat. or P.L. United States from the Abbreviation dropdown.
For statutes created from the 57th Congress to present, you can search by Public Law Number. For statutes created from the 1st through 56th Congress, you can search by Chapter and Year of Enactment.