Sarian, Z. B. (2002). Ever heard of the invisible ranchers?. IN Agri-talk [column]. Philippine Panorama.
Cita Chicago (17th ed.)Sarian, Zac B. "Ever Heard of the Invisible Ranchers?. IN Agri-talk [column]." Philippine Panorama 2002.
Cita MLA (9th ed.)Sarian, Zac B. "Ever Heard of the Invisible Ranchers?. IN Agri-talk [column]." Philippine Panorama, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.