Kent B. Germany, "Historians and the Many Lyndon Johnsons: A Review Essay" Journal of Southern History (2009) 75#4 pág. 1001–1028 na pág. 1005. in JSTOR
Patricia P. Martin and David A. Weaver. "Social Security: A Program and Policy History," Social Security Bulletin, volume 66, no. 1 (2005), ver também a versão online.
Transcript, Lawrence F. O'Brien Oral History Interview XIII, 9/10/86, by Michael L. Gillette, Internet Copy, Johnson Library. [2]Arquivado em 24 de junho de 2008, no Wayback Machine.
Transcript, Lawrence F. O'Brien Oral History Interview XIII, 9/10/86, by Michael L. Gillette, Internet Copy, Johnson Library. [2]Arquivado em 24 de junho de 2008, no Wayback Machine.