(1978). Encyclopedia of chemical technology. Plant-growth substances to potassium compounds. John Wiley r Sons.
Lua i Stíl Chicago (17ú heag.)Encyclopedia of Chemical Technology. Plant-growth Substances to Potassium Compounds. John Wiley r Sons, 1978.
Lua MLA (8ú heag.)Encyclopedia of Chemical Technology. Plant-growth Substances to Potassium Compounds. John Wiley r Sons, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.