Style de citation APA (7e éd.)

Agustin, C. L. (2001). A national ID number system. IN Opinion [column]. Philippine Star.

Style de citation Chicago (17e éd.)

Agustin, Carlos L. "A National ID Number System. IN Opinion [column]." Philippine Star 2001.

Style de citation MLA (9e éd.)

Agustin, Carlos L. "A National ID Number System. IN Opinion [column]." Philippine Star, 2001.