Aronoff, Mark & Kirsten Fudeman : What is Morphology?, 2005. Blackwell. ISBN:?0-631-20319-2.
Ladefoged, P.: Vowels and Consonants, 2nd rev. ed. 2004. Blackwell Publishing.
Odden, David: Introducing Phonology, 2005. Cambridge University Press. ISBN:?0521534046. Kap. 1-7.