Cita APA (7a ed.)

Villegas, B. M. (2001). The crisis of childless societies. Manila Bulletin.

Cita Chicago Style (17a ed.)

Villegas, Bernardo M. "The Crisis of Childless Societies." Manila Bulletin 2001.

Cita MLA (9a ed.)

Villegas, Bernardo M. "The Crisis of Childless Societies." Manila Bulletin, 2001.