Hastings, M. (1958). Twelve on endurance. Macdonald.
Lua i Stíl Chicago (17ú heag.)Hastings, Michael. Twelve on Endurance. London: Macdonald, 1958.
Lua MLA (8ú heag.)Hastings, Michael. Twelve on Endurance. Macdonald, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.