APA استشهاد

Fitter, A. H., & Hay, R. K. M. (1981). Environmental physiology of plants. Academic press.

استشهاد بنمط شيكاغو

Fitter, A H., و R K M. Hay. Environmental Physiology of Plants. London: Academic press, 1981.

MLA استشهاد

Fitter, A H., و R K M. Hay. Environmental Physiology of Plants. Academic press, 1981.