European Ecology Symposium Wageningen, Netherlands, Eijsackers, H., & Quispel, A. (1988). Ecological implications of contemporary agriculture: Proceedings of the 4th European Ecology Symposium, 7-12 September 1986, Wageningen. Munksgaard International.
Παραπομπή σε μορφή Chicago (17η εκδ.)European Ecology Symposium Wageningen, Netherlands, H. Eijsackers, και A. Quispel. Ecological Implications of Contemporary Agriculture: Proceedings of the 4th European Ecology Symposium, 7-12 September 1986, Wageningen. Copenhagen: Munksgaard International, 1988.
Παραπομπή σε μορφή MLA (8th εκδ.)European Ecology Symposium Wageningen, Netherlands, et al. Ecological Implications of Contemporary Agriculture: Proceedings of the 4th European Ecology Symposium, 7-12 September 1986, Wageningen. Munksgaard International, 1988.