Below you will find a complete set of details for 2 different references / citations that are related to the computation of Poisson probabilities (p-values).

Reference for Citing the Online Calculator

- Soper DS. Poisson Probability Calculator [Online Software]. Available from https://www.analyticscalculators.com. 2021.

Reference from the Scientific Literature

- Keller G. Statistics for management and economics. Nelson Education; 2014.