User:Geni/citing encyclopedias

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0101298

cites Ullmann's Encyclopedia of Industrial Chemistry

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0020160

cites The Cambridge Encyclopedia of Language

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0003955

Cites The Tennessee Encyclopedia of History and Culture.