Wikipedia https://ko.wikipedia.org/wiki/록빌_(메릴랜드주)
Official Website https://www.rockvillemd.gov/
Instagram https://www.instagram.com/city_of_rockville/
Facebook https://www.facebook.com/CityofRockville
Link https://twitter.com/Rockville411
좌표 39°4'54.475" N -77°9'6.064" E
