If you find Bokeh useful in your work, a citation is always appreciated.

To cite Bokeh in publications, use:

Bokeh Development Team (2019). Bokeh: Python library for interactive visualization
URL https://bokeh.org

A BibTeX entry for LaTeX users is:

@Manual{,
title = {Bokeh: Python library for interactive visualization},
author = {{Bokeh Development Team}},
year = {2019},
url = {https://bokeh.org/},
}

Bokeh is BSD licensed, so you are free to use it whatever you like, be it academic, commercial, creating forks or derivatives, as long as you copy the BSD statement if you redistribute it (see the License for details). Although not required by the Bokeh license, if it is convenient for you, please consider citing Bokeh when using it in your work and also consider contributing any changes back, so that they may be incorporated for the benefit of the entire Bokeh community.