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Cheng Immergluck, L., S. Kanungo, A. Schwartz, A. McIntyre, P. C. Schreckenberger, και P. S. Diaz. Prevalence of Streptococcus Pneumoniae and Staphylococcus Aureus Nasopharyngeal Colonization in Healthy Children in the United States. Cambridge University Press, 2004.

Cheng Immergluck, L., et al. Prevalence of Streptococcus Pneumoniae and Staphylococcus Aureus Nasopharyngeal Colonization in Healthy Children in the United States. Cambridge University Press, 2004.