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APA Citation
Freeman, J., Kellock, D. B., Yu, C. C., Crocker, J., Levison, D. A., & Hall, P. A. (1993). proliferating cell nuclear antigen (PCNA) and nucleolar organiser regions in Hodgkin's disease: correlation with morphology.. Journal of clinical pathology, 46(5), 446–449. http://access.bl.uk/ark:/81055/vdc_100135544872.0x000046