Superman Volume 2 Issue 7
From Tardis Wiki, the free Doctor Who reference
"Superman Volume 2 Issue 7" is a title based upon conjecture.
Check the behind the scenes section, the revision history and discussion page for additional comments on this article's title.
Whilst flicking through an issue of Superman, the Twelfth Doctor scribbled a pair of glasses onto the titular character in one panel, to demonstrate to Grant Gordon that he was secretly Clark Kent. (TV: The Return of Doctor Mysterio)
Behind the scenes
The comic is unidentified within the story. The way in which the scenes of the Doctor reading it are framed make it look as if the panel appears within the same publication as the series of pages that are actually from issue 19 of the same series.