APA-referens (7:e uppl.)

Marquez, J. (2002). Random drug testing in a private workplace under dangerous drug act of 2002. IN Point of law [column]. Philippine Star.

Chicago-referens (17:e uppl.)

Marquez, Jefferson. "Random Drug Testing in a Private Workplace Under Dangerous Drug Act of 2002. IN Point of Law [column]." Philippine Star 2002.

MLA-referens (9:e uppl.)

Marquez, Jefferson. "Random Drug Testing in a Private Workplace Under Dangerous Drug Act of 2002. IN Point of Law [column]." Philippine Star, 2002.