The United States Air Force Band website, https://www.music.af.mil/USAFBand/About-Us/Ensembles/Singing-Sergeants/

The United States Navy Band website, Ensembles, Sea Chanters https://www.navyband.navy.mil/about

The United States Navy Band website, https://www.navyband.navy.mil/documents/sc-about.pdf

The U.S. Army Band “Pershing’s Own” website, https://usarmyband.com/bios/the-u-s-army-chorus

The United States Army Field Band website, https://www.armyfieldband.com/soldiers-chorus