How do you punctuate a question that quotes a question?

Note: This post relates to content in the eighth edition of the MLA Handbook. For up-to-date guidance, see the ninth edition of the MLA Handbook.

Do not use two question marks. Use only the question mark contained in the quotation:

Which Shakespeare character asked, “Is this a dagger which I see before me,  / The handle toward my hand?” 

But if the sentence includes a parenthetical citation, place the question mark after the citation:

How would you respond to the writer’s question, “How important is punctuation” (5)?