APA

International Humic Substances Society, Humic substances in the global environment and implications on human health, . (1994). Humic sunstances in the global environment nad implications on human health. Proceedings of the 6th International Meeting of the International Humic Substances Society. Amsterdam: Elsevier.

Chicago

International Humic Substances Society, Humic substances in the global environment and implications on human health, . 1994. Humic sunstances in the global environment nad implications on human health. Proceedings of the 6th International Meeting of the International Humic Substances Society. Amsterdam: Elsevier.

Harvard

International Humic Substances Society, Humic substances in the global environment and implications on human health, . (1994). Humic sunstances in the global environment nad implications on human health. Proceedings of the 6th International Meeting of the International Humic Substances Society. Amsterdam: Elsevier.

MLA

International Humic Substances Society, Humic substances in the global environment and implications on human health, . Humic sunstances in the global environment nad implications on human health. Proceedings of the 6th International Meeting of the International Humic Substances Society. Amsterdam: Elsevier. 1994.