In Summer Catalog (2010), Leslie says to Ron, "Why would anyone eat anything other than breakfast foods?" Ron replies, "People are idiots, Leslie." In this episode, Ron asks the same question to Leslie, to which she replies, "People are idiots, Ron."
The song the janitor is listening to - "Man! I Feel Like a Woman" by Shania Twain - is the same as the one the janitor is listening to in Li'l Sebastian (2011) when he interrupts the moment of silence the Parks and Rec department is having.
For the Parks and Rec mix tape Jerry chose "We Didn't Start the Fire" by Billy Joel. Joel's ex-wife Christie Brinkley plays Terry's wife, Gail.
The room where the janitor is cleaning should be Mark's old office.
There's a question mark sticker Leslie had made for her recall election stuck to the wall being cleaned by the janitor.