Cita APA (7a ed.)

(2000). All A.O. 121 and 135 operators. Philippine Star.

Cita Chicago Style (17a ed.)

"All A.O. 121 and 135 Operators." Philippine Star 2000.

Cita MLA (9a ed.)

"All A.O. 121 and 135 Operators." Philippine Star, 2000.