FROM THE CHICAGO MANUAL OF STYLE, 17th edition:
"For articles consulted online, include a URL or the name of the database. Many journal articles list a DOI (Digital Object Identifier). A DOI forms a permanent URL that begins https://doi.org/. This URL is preferable to the URL that appears in your browser’s address bar."
GoogleDoc for Practicing Footnotes and Bibliography Entries -- ARTICLES
Group 9 "Prospects for Nuclear Power"
Group 10 "The Turnkey Era in Nuclear Power"
Citing a web page that quotes a primary source:
Citing a web page with scanned image of a document from an archive:
Citing a web page with a scanned image of an unpublished letter from an archive:
Citing a web page with an interview:
If you do not have a date for the interview, or the name of the interviewer, simply leave them out. Likewise, if there is no "title" to the interview (i.e. “Texan Environmental Activist Diane Wilson: Why I Refuse to go Jail”) just put the word Interview after the name of the person being interviewed.
Citing Congressional Hearings:
Congressional Hearings are held to get the testimony of various experts on an issue of national importance. In the text of your paper, you should identify the name of the person giving testimony, and give some information about him or her, but the footnote and bibliography entry should be under the "author" of the hearings, which is the United States Congress.