1. Agresti, A. (2002). Categorical data analysis (2nd ed.). Wiley Series in Probability and Statistics, America, 653 pp.
2. Albrechtsen, L., Johnson P. & Ditton, A. (2022). Bushmeat consumption in tropical forests. Wildlife Conservation Research Unit (WILDCRU). Retrieved from https://www.wildcru.org/research/reas-5/. Accessed January 13, 2023.
3. Andimile, M., Floros, C., & TRAFFIC (2021). Rapid assessment of the bushmeat trade in urban centres in Tanzania: an analysis from Dar es Salaam, Morogoro, Mbeya, Arusha, and Manyara. Retrieved from https://www.traffic.org/site/assets/files/14550/int386-retta-bushmeat_market_survey_eaf_report-20210225-vfinal.pdf. Accessed February 10, 2023.
4. Ari, E., & Yildiz, Z. (2014). Parallel lines assumption in ordinal logistic regression and analysis approaches. International Interdisciplinary Journal of Scientific Research, 1, 3, 8: 23. Retrieved from https://silo.tips/download/parallel-lines-assumption-in-ordinal-logistic-regression-and-analysis-approaches. Accessed January 18, 2022.
5. Atkinson, R. & Flit, J. (2001). Accessing hidden and hard-to-reach populations: Snowball research strategies. Social Research Update. Issue 33, Department of Sociology, University of Surrey, UK. Retrieved from https://sru.soc.surrey.ac.uk/SRU33.html. Accessed October 14, 2022.