If you use a model available in the AMT, cite the paper describing the model and the AMT providing the implementation.
For example, when using the auditory-nerve bruce2018 from the AMT 1.0 in your research, you could write:
The peripheral processing was performed with the auditory-nerve model (Bruce et al., 2018) implemented in the auditory modeling toolbox (AMT) version 1.0 (Majdak et al., 2021).
Majdak, P., Hollomey, C., and Baumgartner, R. "AMT 1.0: the toolbox for reproducible research in auditory modeling," submitted to Acta Acustica. [bibtex] [PDF]