Huvudgrupp 1

• Moravcsik, Edith A., Introducing language typology, Cambridge, Cambridge University Press, 2013
• Pereltsvaig, Asya, Languages of the world: an introduction, Fourth edition, Cambridge, United Kingdom, Cambridge University Press, 2024
• Dryer, Matthew S.; Haspelmath, Martin, The World Atlas of Language Structures Online, Leipzig: Max Planck Institute for Evolutionary Anthropology, 2013 (Available online at http://wals.info)
• Hammarström, Harald m.fl., Glottolog 5.0, Jena: Max Planck Institute for the Science of Human History, 2024, https://glottolog.org/
• Eberhard, David M.; Simons, Gary F.; Fenning, Charles D., Languages of the World, 27th edition, Dallas: SIL International, 2024, https://www.ethnologue.com/