The bibtex entries for PyAutoFit and its affiliated software packages can be found here, with example text for citing PyAutoFit in .tex format here format here and .md format here.
As shown in the examples, we would greatly appreciate it if you mention PyAutoFit by name and include a link to our GitHub page!
PyAutoFit is published in the Journal of Open Source Software and its entry in the above .bib file is under the key pyautofit.