1-Carden Jennings Publishing Co., Ltd.http://www.nhlbi.nih.gov/health/dci/Diseases/Itp/ITP

2-http://www.pediatrics.wisc.edu/education/derm/tutb/petechiae.html.

3-Post-graduate haematology.fifth edition,2005

4-Practical diagnosis of hematologic disorders third edition 2000 .