Gregg, C. F. (1974). The ten black pearls: A tale without a moral. White Lion Publishers.
Lua i Stíl Chicago (17ú heag.)Gregg, Cecil Freeman. The Ten Black Pearls: A Tale Without a Moral. London: White Lion Publishers, 1974.
Lua MLA (8ú heag.)Gregg, Cecil Freeman. The Ten Black Pearls: A Tale Without a Moral. White Lion Publishers, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.