Cohen, Jonathan and Powderly, William G. 2004. Infectious Diseases. 2nd ed. Mosby.
John, David T.
and Petri, William A. 2006. Markell and Voge's Medical Parasitology. 9th ed. St. Louis: Elsevier Inc.
Mandell, Gerald L.; Bennett, John E. and Dolin, Raphael. 2005. Mandell, Douglas and Bennett's Principles and Practice of Infectious Diseases. 6th ed. Philadelphia: Churchill Livingstone, An Imprint of Elsevier.
Press, Cynthia; Montoya, Jose G. and Remington, Jack S. Use of a Single Serum Sample for Diagnosis of Acute Toxoplasmosis in Pregnant Women and Other Adults. J Clin Microbiology 2005;43(7):3481-3483.
Division of Parasitic Diseases, Centers for Disease Control. DPDx Image Library. Accessed 2006 May 24. URL: http://www.dpd.cdc.gov/dpdx/HTML/ImageLibrary/Toxoplasmosis_il.htm