Mortimer, P. (1986). Queen Elizabeth: A Portrait of the Queen Mother. St. Martin's Press.
Lua i Stíl Chicago (17ú heag.)Mortimer, Penelope. Queen Elizabeth: A Portrait of the Queen Mother. New York, USA: St. Martin's Press, 1986.
Lua MLA (9ú heag.)Mortimer, Penelope. Queen Elizabeth: A Portrait of the Queen Mother. St. Martin's Press, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.