Middleton, J. T., & Darley, E. F. (1966). Plant damage: An indicator of the presence and distribution of air pollution. World Health Organization.
استشهاد بنمط شيكاغوMiddleton, J. T., و E. F. Darley. Plant Damage: An Indicator of the Presence and Distribution of Air Pollution. World Health Organization, 1966.
MLA استشهادMiddleton, J. T., و E. F. Darley. Plant Damage: An Indicator of the Presence and Distribution of Air Pollution. World Health Organization, 1966.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.