«Arkivert kopi». Arkivert fra originalen 18. juli 2012. Besøkt 1. oktober 2020., 21. Oktober 1946, Seite 78–79 (PDF Seiten 86–87)
books.google.com
John Koster: Operation Snow: How a Soviet Mole in FDR's White House Triggered Pearl Harbor (Regnery Publishing 2012), særlig kapittel. 5, "The May Memorandum."
Eric Rauchway. "Whitewashing History" Finance and Development 50, no. 1 (mars 2013) 53–54 online