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* [[Alexander Hislop|* Hislop, Alexander]] (1903). ''[[The Two Babylons]]''. Third edition. S.W. Partridge. Web.** Hubbard, Benjamin Jerome. Hatfield, John T. Santucci, James A. (2007). ''An Educator's Classroom Guide to America's Religious Beliefs and Practices''. Libraries Unlimited. {{ISBN|:1-59158-409-4}}* [[John Allen Giles|* Giles, John Allen]] (1843). ''The Complete Works of the Venerable Bede, in the Original Latin, Collated with the Manuscripts, and Various Print Editions, Accompanied by a New English Translation of the Historical Works, and a Life of the Author. Vol. VI: Scientific Tracts and Appendix.'' London: Whittaker and Co., Ave Maria Lane.
* {{Cite book|last=Kroonen|first=Guus|title=Etymological Dictionary of Proto-Germanic|year=2013|publisher=Brill|isbn=9789004183407}}
* {{cite book|last1=Mallory|first1=J. P.|author-link=J. P. Mallory|last2=Adams|first2=Douglas Q.|author2-link=Douglas Q. Adams|year=1997|title=[[Encyclopedia of Indo-European Culture]]|publisher=[[Taylor & Francis]]|isbn=1-884964-98-2}}