Metcalf ,Robert L, Metcalf , R. L. ., & McKelvey , J. J.. (1976). The future for insecticides:needs and prospects: Proceedings of a rockefeller foundation conference Bellagio , Ilaly , april 22 - 27 , 1974. John wiley & sons.
استشهاد بنمط شيكاغوMetcalf ,Robert L, Robert L. Metcalf , و John J. McKelvey. The Future for Insecticides:needs and Prospects: Proceedings of a Rockefeller Foundation Conference Bellagio , Ilaly , April 22 - 27 , 1974. New York: John wiley & sons, 1976.
MLA استشهادMetcalf ,Robert L, et al. The Future for Insecticides:needs and Prospects: Proceedings of a Rockefeller Foundation Conference Bellagio , Ilaly , April 22 - 27 , 1974. John wiley & sons, 1976.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.