Eileen Crofton: Angels of Mercy: A Women’s Hospital on the Western Front 1914–1918. Birlinn Ltd., Edinburgh 2013, ISBN 978-0-85790-616-8, S.14, 71, 179, 256 (google.com).
RCOG Heritage Collections: Pioneers: Ruth Nicholson, FRCOG 1931. Royal College of Obstetricians and Gynaecologists Heritage, 21. Juli 2017, abgerufen am 28. Januar 2022.