Encylopedia... (1992). Encyclopedia of science and technology: Bor-Cle. Vol. III. Mc Graw-Hill.
Lua i Stíl Chicago (17ú heag.)Encylopedia... Encyclopedia of Science and Technology: Bor-Cle. Vol. III. Mc Graw-Hill, 1992.
Lua MLA (8ú heag.)Encylopedia... Encyclopedia of Science and Technology: Bor-Cle. Vol. III. Mc Graw-Hill, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.