Παραπομπή σε μορφή APA (7η εκδ.)

Costanza, R., & Jorgensen, S. E. (2002). Understanding and solving environmental problems in the 21st century: Toward a new, integrated hard problem science. Elsevier.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Costanza, Robert, και Sven Erik Jorgensen. Understanding and Solving Environmental Problems in the 21st Century: Toward a New, Integrated Hard Problem Science. Amsterdam: Elsevier, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

Costanza, Robert, και Sven Erik Jorgensen. Understanding and Solving Environmental Problems in the 21st Century: Toward a New, Integrated Hard Problem Science. Elsevier, 2002.