Feist, Timothy (2010). A Grammar of Skolt Saami (PhD thesis). Manchester, England: University of Manchester. https://research.manchester.ac.uk/en/studentTheses/a-grammar-of-skolt-saami
Feist, Timothy (2010). A Grammar of Skolt Saami (PhD thesis). Manchester, England: University of Manchester. https://research.manchester.ac.uk/en/studentTheses/a-grammar-of-skolt-saami
Poolaw, Dane (2023). ǥáuiđòᵰ꞉gyà–tʼáukáuidóᵰ꞉gyá : Kiowa–English student glossary (PDF). https://learnkiowa.org/wp-content/uploads/2023/11/23GlossaryA.pdf
Griffiths, Glyn (2002). Dicionário da Língua Kadiwéu; Kadiwéu – Português, Português – Kadiwéu (PDF). SIL. https://www.sil.org/system/files/reapdata/74/06/08/74060839706011162756896570533590209458/KDDict.pdf
"Germanic languages | Consonants | Britannica". Encyclopedia Britannica. 27 March 2025. Retrieved 22 May 2025. https://www.britannica.com/topic/Germanic-languages#ref603758
International Phonetic Association (1912). Passy, Paul; Jones, Daniel (eds.). The Principles of the International Phonetic Association. p. 12. Retrieved 27 May 2025. https://books.google.com/books?id=8rowAQAAMAAJ&ots=Obbw-qFTOA&dq=The%20principles%20of%20the%20International%20Phonetic%20Association.&lr&pg=PA12#v=onepage&q&f=false