Burrell, C. J., Tonkin, R. W., Proudfoot, E., Leadbetter, G., Cowan, P., Lockerbie, L., . . . Marmion, B. P. (1977). Prevalence of antibody to hepatitits B surface antigen among staff in an Edinburgh hospital. Cambridge University Press.

Burrell, C. J., R. W. Tonkin, E. Proudfoot, G. Leadbetter, P. Cowan, L. Lockerbie, S. Gore, W. Lutz, ja B. P. Marmion. Prevalence of Antibody to Hepatitits B Surface Antigen Among Staff in an Edinburgh Hospital. Cambridge University Press, 1977.

Burrell, C. J., et al. Prevalence of Antibody to Hepatitits B Surface Antigen Among Staff in an Edinburgh Hospital. Cambridge University Press, 1977.