Heyer, G. (1978). Duplicate death. Panther.
Lua i Stíl Chicago (17ú heag.)Heyer, Georgette. Duplicate Death. London: Panther, 1978.
Lua MLA (9ú heag.)Heyer, Georgette. Duplicate Death. Panther, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.