APA
United States Department of Agriculture A. R. S. O. o. I. C. a. D. S. C. S. U. S. D. o. I. N. P. S., Plant-Soil Interactions at Low pH, . (1991). Plant-Soil Interactions at Low pH. Proceedings of the Second International Symposium on Plant-Soil Interactions at Low pH. Dordrecht: Kluwer Academic Publishers.
Chicago
United States Department of Agriculture Agricultural Research Service Office of International Cooperation and Development Soil Conservation Service United States Department of Interior National Park Service, Plant-Soil Interactions at Low pH, . 1991. Plant-Soil Interactions at Low pH. Proceedings of the Second International Symposium on Plant-Soil Interactions at Low pH. Dordrecht: Kluwer Academic Publishers.
Harvard
United States Department of Agriculture A. R. S. O. o. I. C. a. D. S. C. S. U. S. D. o. I. N. P. S., Plant-Soil Interactions at Low pH, . (1991). Plant-Soil Interactions at Low pH. Proceedings of the Second International Symposium on Plant-Soil Interactions at Low pH. Dordrecht: Kluwer Academic Publishers.
MLA
United States Department of Agriculture Agricultural Research Service Office of International Cooperation and Development Soil Conservation Service United States Department of Interior National Park Service, Plant-Soil Interactions at Low pH, . Plant-Soil Interactions at Low pH. Proceedings of the Second International Symposium on Plant-Soil Interactions at Low pH. Dordrecht: Kluwer Academic Publishers. 1991.