Ndugwa, R. P., Kabiru, C. W., Cleland, J., Beguy, D., Egondi, T., Zulu, E. M., & Jessor, R. (2010). Adolescent Problem Behavior in Nairobi's Informal Settlements: Applying Problem Behavior Theory in Sub-Saharan Africa. Springer US.

Ndugwa, Robert P., Caroline W. Kabiru, John Cleland, Donatien Beguy, Thaddeus Egondi, Eliya M. Zulu, và Richard Jessor. Adolescent Problem Behavior in Nairobi's Informal Settlements: Applying Problem Behavior Theory in Sub-Saharan Africa. Springer US, 2010.

Ndugwa, Robert P., et al. Adolescent Problem Behavior in Nairobi's Informal Settlements: Applying Problem Behavior Theory in Sub-Saharan Africa. Springer US, 2010.