The Churchill Centre - These quotes make for good story-telling but popular myth has falsely attributed them to Churchill.
Monticello.org - a collection of quotations commonly misattributed to Thomas Jefferson.
enotes.com - Faux Shakespeare Phrases often misattributed to Shakespeare
Robert Lewis Stevenson
RLS.org - most comprehensive web resource dedicated to Robert Louis Stevenson, designed for all.
Mountvernon.com - a list of quotations misattributed to George Washington that have been sent to the Mount Vernon library.
50 Common Misquotations - by mental_floss on YouTube