Goodwin, N., Mays, N., McLeod, H., Malbon, G., & Raftery, J. (1998). Evaluation of total purchasing pilots in England and Scotland and implications for primary care groups in England: Personal interviews and analysis of routine data. BMJ.

Goodwin, Nicholas, Nicholas Mays, Hugh McLeod, Gill Malbon, و James Raftery. "Evaluation of Total Purchasing Pilots in England and Scotland and Implications for Primary Care Groups in England: Personal Interviews and Analysis of Routine Data." BMJ 1998.

Goodwin, Nicholas, et al. "Evaluation of Total Purchasing Pilots in England and Scotland and Implications for Primary Care Groups in England: Personal Interviews and Analysis of Routine Data." BMJ 1998.