1. Ajong, A. B., Njotang, P. N., Yakum, M. N., Essi, M. J., Essiben, F., Eko, F. E., et al. (2016). Determinants of unmet need for family planning among women in Urban Cameroon : a cross sectional survey in the Biyem-Assi Health District , Yaoundé. BMC Women's Health, 16(1), 4 https://doi.org/10.1186/s12905-016-0283-9.
2. Alaba, O. O., Olaomi, J., & Olubusoye, O. E. (2015). Spatial pattern and determinants of unmet need of family planning in Nigeria. South African Family Practice, 57(5), 306–312 https://doi.org/10.1080/20786190.2015.1071536.
3. Ayele, W., Tesfaye, H., Gebreyes, R., & Gebreselassie, T. (2013). Trends and determinants of unmet need for family planning and programme options, Ethiopia. Further Analysis of the 2000, 2005, and 2011 Demographic and Health Surveys. Calverton, MD: ICF International.
4. Bradley, S. E. K., Croft, T. N., Fishel, J. D., & Westoff, C. F. (2012). Revising unmet need for family planning. DHS Analytical Studies No. 25. Calverton, Maryland, USA: ICF International.
5. R Core Team. (2018). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. Retrieved from http://www.r-project.org/