1. ‘Mothers of the Sea’, Cunard Line, April 1921, p. 134.
2. Cunard Line, November 1919, p. 29.
3. ‘Have an Ambition’, Cunard Line, August 1920, p. 82.
4. Cunard Archives, Liverpool. Accessed 19 February 2018. D.785/1 – ‘Emigrations on Tyrrhenia and Laconia’: Typewritten account of the early years of Marie Riffelmacher/Ruffelmacher, written up by her granddaughter Kathleen Stroemer Czuba.
5. Frederick A. Wallis. What about the Immigrant? The Rotarian, 1921, p. 249.