Paperback Writer

From Tardis Wiki, the free Doctor Who reference

"Paperback Writer" was playing in a London café visited by the Second Doctor and Jamie in 1966. (DW: The Evil of the Daleks)

Though not identified in the episode, the Beatles were the originators of the tune. Unsurprisingly, rights issues prevented it from being included on the audiobook version of The Evil of the Daleks. Because the particular episode in which it appeared is a missing one, and neither dialogue nor the novelisation make reference to it, the fact that the song is a part of the Doctor Who universe is largely forgotten.
Paperback Writer