Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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