Castillo, R. (2013). Melatonin, aging and cancer. IN Medical files [column]. Philippine Daily Inquirer.
Chicago-viite (17. p.)Castillo, Rafael. "Melatonin, Aging and Cancer. IN Medical Files [column]." Philippine Daily Inquirer 2013.
MLA-viite (9. p.)Castillo, Rafael. "Melatonin, Aging and Cancer. IN Medical Files [column]." Philippine Daily Inquirer, 2013.
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