Παραπομπή σε μορφή APA (7η εκδ.)

Nicholls, Y. I. (1973). Source book: Emergence of proposals for recompensing developing countries for maintaining environmental quality. IUCN.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nicholls, Yvonne I. Source Book: Emergence of Proposals for Recompensing Developing Countries for Maintaining Environmental Quality. Morges: IUCN, 1973.

Παραπομπή σε μορφή MLA (9th εκδ.)

Nicholls, Yvonne I. Source Book: Emergence of Proposals for Recompensing Developing Countries for Maintaining Environmental Quality. IUCN, 1973.