An introduction to the concept of phonemes, allophones and some common phonological alternations.
Wayland, R. (2019). Phonetics: A Practical Introduction. Cambridge: Cambridge University Press. doi:10.1017/9781108289849
Chapter 5: Phonemic and Morphophonemic Analysis
https://doi-org.ezproxy.is.ed.ac.uk/10.1017/9781108289849.006
University of Edinburgh access