Harrison, G. R. (1075). McGraw-Hill Encyclopedia of Science & Technology 14. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Harrison, Geoge R. McGraw-Hill Encyclopedia of Science & Technology 14. McGraw-Hill, 1075.
Lua MLA (8ú heag.)Harrison, Geoge R. McGraw-Hill Encyclopedia of Science & Technology 14. McGraw-Hill, 1075.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.