Παραπομπή σε μορφή APA (7η εκδ.)

Westin, R. A. (1997). Environmental tax initiatives and multilateral trade agreements: Dangerous collisions. Kluwer Law International.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Westin, Richard A. Environmental Tax Initiatives and Multilateral Trade Agreements: Dangerous Collisions. The Hague: Kluwer Law International, 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Westin, Richard A. Environmental Tax Initiatives and Multilateral Trade Agreements: Dangerous Collisions. Kluwer Law International, 1997.