<p>I would like to use the figure in <a href="https://stats.stackexchange.com/questions/123651/geometric-interpretation-of-multiple-correlation-coefficient-r-and-coefficient">this post</a> showing the geometry of the correlation coefficients.  I am currently writing a book and would like to include this figure.  How do I obtain permission to use this figure and how do I then cite the figure?</p>
