Campbell, Lyle: Historical Linguistics – An Introduction (Second Edition, 2004). Edinburgh University Press
Edward L. Keenan og Matthew S. Dryer: Passive in the World's Languages. 2007 http://linguistics.buffalo.edu/people/faculty/dryer/dryer/KeenanDryerPassive.pdf
Judith Aissen: Markedness and Subject Choice in Optimality Theory. Natural Language and Linguistic Theory 17, 4, 673-711http://www.swetswise.com/swetsfo/swproxy?url=http%3A%2F%2Fcontent.kluweronline.com%2Farticle%2F242305%2Ffulltext&ts=1191927297811&cs=2253707230
Kenneth Hale, Mary Laughren og Jane Simpson: "Warlpiri" i Joachim Jacobs et al. (red.) : Syntax: ein internationales Handbuch zeitgen?ssischer Forschung, 1996. Walter de Gruyter. pp.1430-1451.
Kompendium:
- Comrie, Bernard: Language Universals and Linguistics Typology – Syntax and Morphology (siste utgave) Blackwell, Oxford. Kap. 1, 4 - 8.