Suggested Insignia for the Senior Enlisted Advisor to the Chairman of the Joint Chief of Staff is a 2005 paper by Dan Elder.

Gainey Embarks on Historic Tour of Duty is a 2006 On Point article written by Dave Crozier about Sgt. Maj. William J. “Joe” Gainey.

Gainey Retires after 33 Years Service is a 2008 AUSA News article about the retirement of Sgt. Maj. William J. “Joe” Gainey.

A Sergeant Major of the Army Named is a The New York Times article about the appointment of William O. Wooldridge.

Insignia Worn by the Sergeant Major of the Army is a 1983 memorandum for the Deputy Chief of Staff for Personnel.

The Original Insignia is a description of the original Sergeant Major insignia.

Military Specification Sheet is a 1988 sheet that covers the specifications for the insignia and collar for the SMA.

A Sergeant Major of the Army Named is a Scrapbook page about William O. Wooldridge and the establishment of the SMA.

Insignia of Grade, Embroidered Enlisted Personnel, US Army is a 1994 Institute of Heraldry document of measurements.