AN ULLMANN'S. (1999). An Ullmann's encyclopedia industrial inorganic chemicals and products volume 3: Fertilizers to hydrogen. Wiley-VCH.
Lua i Stíl Chicago (17ú heag.)AN ULLMANN'S. An Ullmann's Encyclopedia Industrial Inorganic Chemicals and Products Volume 3: Fertilizers to Hydrogen. Weinheim: Wiley-VCH, 1999.
Lua MLA (9ú heag.)AN ULLMANN'S. An Ullmann's Encyclopedia Industrial Inorganic Chemicals and Products Volume 3: Fertilizers to Hydrogen. Wiley-VCH, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.