In Toy Story 3 Andy has a poster on his wall featuring a simplistic drawing of Buzz. In the recreaction this Buzz is actually designes to resemble Buzz from the Buzz Lightyear of Star Command (2000) cartoon.
When Woody decides to leave Sunnyside you can see a glue bottle belonging to somebody names Bluth. This a reference to the Bluth family from the TV show Arrested Development (2003).