You do not cite the speech itself. Find an authoritative location where the speech is and cite that. For example, if you were reading the speech in a book, simply cite the book. If you read the speech on a website, cite the website.
For example, if you’ve found Dr. King’s speech in a book of great speeches, your reference might be as follows.
Smith, J. (Ed.). (2009). Well said! Great speeches in American history. Washington, DC: E & K Publishing.
The in-text citation would include the surname of the author or editor of the source document and the year of publication. For example, your sentence might look like this:
Dr. King declared, “I have a dream that one day this nation will rise up and live out the true meaning of its creed” (Smith, 2009).
MLA
Provide the speaker's name,
Title of the speech or lecture, using quotation marks. If there isn't a title of the speech, describe what kind of speech it is without quotation marks (For example: Commencement Address, Lecture, Keynote Address, etc.)
If applicable - Organization/Club/Sponsor,
The location, including the building and the city,
Day, month, year.
Example: Simpleton, Joe. "Nationalization of Government." Preservation of Democracy Society. Freedom Hall, Knoxville. 10 January 2009.
