APA استشهاد

Hellawell, J. (1986). Biological Indicaors of Freshwater Pollution and Environmental Management. Elsevier Applied Science.

استشهاد بنمط شيكاغو

Hellawell, J.M. Biological Indicaors of Freshwater Pollution and Environmental Management. London: Elsevier Applied Science, 1986.

MLA استشهاد

Hellawell, J.M. Biological Indicaors of Freshwater Pollution and Environmental Management. Elsevier Applied Science, 1986.

تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.