(2004). Guidelines for the issuance of endorsements of industries in the Philippine Environment Partnership Program (PEPP). Philippine Star.
Cita Chicago (17th ed.)"Guidelines for the Issuance of Endorsements of Industries in the Philippine Environment Partnership Program (PEPP)." Philippine Star 2004.
Cita MLA (9th ed.)"Guidelines for the Issuance of Endorsements of Industries in the Philippine Environment Partnership Program (PEPP)." Philippine Star, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.