Παραπομπή σε μορφή APA (7η εκδ.)

(1998). Valuing the global environment: Actions & investments for a 21st century. Global Environment Facility.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Valuing the Global Environment: Actions & Investments for a 21st Century. Washington, D.C.: Global Environment Facility, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Valuing the Global Environment: Actions & Investments for a 21st Century. Global Environment Facility, 1998.