Entryon Bfi.org.uk, retrieved 2012-12-01, and Douglas Brode: Once Was Enough: Celebrities (And Others) Who Appeared a Single Time on the Screen. Citadel Press, 1996, p. 154. Jean Schrepfermann according to Everett Aaker: Encyclopedia of Early Television Crime Fighters: All Regular Cast Members in American Crime and Mystery Series, 1948-1959. McFarland, 2006, p. 354. نسخة محفوظة 09 سبتمبر 2009 على موقع واي باك مشين. [وصلة مكسورة]
web.archive.org
Entryon Bfi.org.uk, retrieved 2012-12-01, and Douglas Brode: Once Was Enough: Celebrities (And Others) Who Appeared a Single Time on the Screen. Citadel Press, 1996, p. 154. Jean Schrepfermann according to Everett Aaker: Encyclopedia of Early Television Crime Fighters: All Regular Cast Members in American Crime and Mystery Series, 1948-1959. McFarland, 2006, p. 354. نسخة محفوظة 09 سبتمبر 2009 على موقع واي باك مشين. [وصلة مكسورة]
