Additional sources
- Stanley Green, The World of Musical Comedy, 4th Edition, Da Capo Press, New York, 1980
- Robert Kimball (ed.), Cole, Holt, Reinhart & Winston, New York, 1971
- Frank Van Straten, Hanky-Panky: The Theatrical Escapades of Ernest C. Rolls, Australian Scholarly Publishing, North Melbourne, Vic, 2020
- Vivyan Ellacott, Over a Hundred Years of London Musicals (1910–2018), http://www.overthefootlights.co.uk/London_Musicals.html
- Jackson Upperco, Porter Corner: The Early ’40s (Post One), https://jacksonupperco.com/2014/01/13/porter-corner-the-early-40s-post-one/
- The New York Times on-line Archive
- The Times (London) on-line Archive
- The Sunday Times (London) on-line Archive
- Playbill Vault, https://www.playbill.com/production/lets-face-it-imperial-theatre-vault-0000006071
- Internet Broadway Data Base, ibdb.com
- Internet Movie Data Base, imdb.com
- Danny Kaye 78 rpm Discography, http://www.45worlds.com/78rpm/artist/danny-kaye/us
- Hildegarde 78 rpm Discography, https://www.discogs.com/artist/1641534-Hildegarde