Grady, D. (2008). Hard-to-detect lesions linked to colon cancer, study finds. Manila Bulletin.
Cita Chicago Style (17a ed.)Grady, Denise. "Hard-to-detect Lesions Linked to Colon Cancer, Study Finds." Manila Bulletin 2008.
Cita MLA (9a ed.)Grady, Denise. "Hard-to-detect Lesions Linked to Colon Cancer, Study Finds." Manila Bulletin, 2008.
Precaución: Estas citas no son 100% exactas.