APA-referens (7:e uppl.)

Villegas, B. M. (2005). The Need for foreign direct investments. IN Business and society [column]. Manila Bulletin.

Chicago-referens (17:e uppl.)

Villegas, Bernardo M. "The Need for Foreign Direct Investments. IN Business and Society [column]." Manila Bulletin 2005.

MLA-referens (9:e uppl.)

Villegas, Bernardo M. "The Need for Foreign Direct Investments. IN Business and Society [column]." Manila Bulletin, 2005.