Registo de Ammoniak na Base de Dados de Substâncias GESTIS do IFA, accessado em 28 de junho de 2008.
doi.org
dx.doi.org
Frederick G. Bordwell, George E. Drucker, Herbert E. Fried: Acidities of Carbon and Nitrogen Acids: The Aromaticity of the Cyclopentadienyl Anion. In: J. Org. Chem. 46, 1981, S. 632–635 (doi:10.1021/jo00316a032).
National Institute of Standards and Technology: Thermophysikal Properties of Fluid Systems. http://webbook.nist.gov/chemistry/fluid/ aufgerufen am 1. März 2010.