Παραπομπή σε μορφή APA (7η εκδ.)

(2005). Ecology and environment in Sri Lanka. Library of Congress Office ; Library of Congress Photoduplication Service.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ecology and Environment in Sri Lanka. New Delhi : Washington, D.C.: Library of Congress Office ; Library of Congress Photoduplication Service, 2005.

Παραπομπή σε μορφή MLA (8th εκδ.)

Ecology and Environment in Sri Lanka. Library of Congress Office ; Library of Congress Photoduplication Service, 2005.