Senning, Alexander (2007). "lapis lazuli (lazurite)". Elsevier's Dictionary of Chemoetymology. Amsterdam: Elsevier. m/s. 224. ISBN978-0-444-52239-9. Cite has empty unknown parameter: |coauthors= (bantuan)
Weekley, Ernest (1967). "azure". An Etymological Dictionary of Modern English. New York: Dover Publications. m/s. 97. Cite has empty unknown parameter: |coauthors= (bantuan)