Heermance, E. L. (1922). Chaos or cosmos? E. P. Dutton & company.
Lua i Stíl Chicago (17ú heag.)Heermance, Edgar L. Chaos or Cosmos? New York: E. P. Dutton & company, 1922.
Lua MLA (8ú heag.)Heermance, Edgar L. Chaos or Cosmos? E. P. Dutton & company, 1922.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.