Pearce, D. W. (1993). World Without End: Economics, Enviroment, nad Sustainable Development. Oxford University.
استشهاد بنمط شيكاغوPearce, David W. World Without End: Economics, Enviroment, Nad Sustainable Development. New Delhi: Oxford University, 1993.
MLA استشهادPearce, David W. World Without End: Economics, Enviroment, Nad Sustainable Development. Oxford University, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.