Jim,
There is an article that was used in the MHSc HP program at U of T on the
steps to building conceptual models etc. It was:
Earp, J. A., & Tennet, S. T. (1991). "Conceptual Models in Health Education
Research and Practice." Health Education Research. 6, 163 - 171
Hope this is useful,
Jen Craven, MHSc.