APA aipamena

Perlas, N. (1998). Philippine agenda 21 handbook. Center for Alternative Development Initiatives].

Chicago Style aipamena

Perlas, Nicanor. Philippine Agenda 21 Handbook. [Quezon City, Philippines: Center for Alternative Development Initiatives], 1998.

MLA aipamena

Perlas, Nicanor. Philippine Agenda 21 Handbook. Center for Alternative Development Initiatives], 1998.