Santmire, H. P. (1985). The travail of nature. Fortress press.
Lua i Stíl Chicago (17ú heag.)Santmire, H. Paul. The Travail of Nature. Minnepolis: Fortress press, 1985.
Lua MLA (9ú heag.)Santmire, H. Paul. The Travail of Nature. Fortress press, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.