Hillmer, N. (2013). O.D. Skelton: The work of the world, 1923-1941. McGill-Queen's University Press.
Lua i Stíl Chicago (17ú heag.)Hillmer, Norman. O.D. Skelton: The Work of the World, 1923-1941. Montreal [Canada]: McGill-Queen's University Press, 2013.
Lua MLA (9ú heag.)Hillmer, Norman. O.D. Skelton: The Work of the World, 1923-1941. McGill-Queen's University Press, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.