On Saturday, 11 Feb 2017 at 18:23, Sharon Kimble wrote:
> Or, in other words, how can I kill the level 5 heading after
> "(cite:0580)" so that "Data confirms that ..." is under a level 4
> heading please?

You cannot.  There are no "terminating" headline directives in org other
than inline tasks.

Start another level 4 heading instead.

-- 
: Eric S Fraga (0xFFFCF67D), Emacs 26.0.50.1, Org release_9.0.4-242-g2c27b8