Yamsuan, C. C. (2013). Enrile: Gift, yes; bribe, no : Santiago returned P250K to Senate President. Philippine Daily Inquirer.
Chicago-referens (17:e uppl.)Yamsuan, Cathy Cañares. "Enrile: Gift, Yes; Bribe, No : Santiago Returned P250K to Senate President." Philippine Daily Inquirer 2013.
MLA-referens (9:e uppl.)Yamsuan, Cathy Cañares. "Enrile: Gift, Yes; Bribe, No : Santiago Returned P250K to Senate President." Philippine Daily Inquirer, 2013.
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