Forbes Asia Magazine. (2012). Sy leads Forbes' list of 15 PH billionaires. Philippine Daily Inquirer.
Chicago-viite (17. p.)Forbes Asia Magazine. "Sy Leads Forbes' List of 15 PH Billionaires." Philippine Daily Inquirer 2012.
MLA-viite (9. p.)Forbes Asia Magazine. "Sy Leads Forbes' List of 15 PH Billionaires." Philippine Daily Inquirer, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.