ERSON, AYSE E., and ELIZABETH M. PETTY. "Molecular and Genetic Events in Neoplastic Transformation." Cancer Epidemiology and Prevention. : Oxford University Press, 2006-10-12. Oxford Scholarship Online. 2009-09-01. Date Accessed 25 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195149616.001.0001/acprof-9780195149616-chapter-4>.
ERSON, A., & PETTY, E.(2006-10-12). Molecular and Genetic Events in Neoplastic Transformation. In Cancer Epidemiology and Prevention. : Oxford University Press. Retrieved 25 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195149616.001.0001/acprof-9780195149616-chapter-4.
ERSON, AYSE E., and ELIZABETH M. PETTY. "Molecular and Genetic Events in Neoplastic Transformation." In Cancer Epidemiology and Prevention. : Oxford University Press, 2006-10-12. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195149616.001.0001/acprof-9780195149616-chapter-4.
ERSON AE, PETTY EM. Molecular and Genetic Events in Neoplastic Transformation. In: Schottenfeld D, Fraumeni JF. Cancer Epidemiology and Prevention. Oxford University Press; 2006. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195149616.001.0001/acprof-9780195149616-chapter-4. Accessed May 25, 2013.