Wright, R. T., & Bernard, N. J. (2002). Environmental science towards a sustainable future (8th ed.). Prentice-Hall of India.
استشهاد بنمط شيكاغوWright, Richard T., و Nebel J. Bernard. Environmental Science Towards a Sustainable Future. 8th ed. New Delhi: Prentice-Hall of India, 2002.
MLA استشهادWright, Richard T., و Nebel J. Bernard. Environmental Science Towards a Sustainable Future. 8th ed. Prentice-Hall of India, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.