National Cancer Institute. (2002). PDQ cancer information summaries. National Cancer Institute.
Cita Chicago Style (17a ed.)National Cancer Institute. PDQ Cancer Information Summaries. Bethesda, MD: National Cancer Institute, 2002.
Cita MLA (9a ed.)National Cancer Institute. PDQ Cancer Information Summaries. National Cancer Institute, 2002.
Precaución: Estas citas no son 100% exactas.