Sadoh, A. E., W. E. Sadoh, J. Uduebor, P. Ekpebe, and O. Iguodala. “Factors Contributing to Delay in Commencement of Immunization in Nigerian Infants”. Tanzania Journal of Health Research, vol. 15, no. 3, Oct. 2013, doi:10.4314/thrb.v15i3.6.