Ward, H., & Brack, D. (2000). Trade, investment and the environment: Proccedings of the Royal Institute of International Affairs Conference, Chatham House, London, October 1998. Londra: Earthscan.
استشهاد بنمط شيكاغوWard, Halina., and Duncan Brack. Trade, Investment and the Environment: Proccedings of the Royal Institute of International Affairs Conference, Chatham House, London, October 1998. Londra: Earthscan, 2000.
MLA استشهادWard, Halina., and Duncan Brack. Trade, Investment and the Environment: Proccedings of the Royal Institute of International Affairs Conference, Chatham House, London, October 1998. Londra: Earthscan, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.