APA

Knight R. L., Kadlec R. H., American Petroleum Institute A., Knight R. L. & Kadlec R. H. (1998). The use of treatment wetlands for petroleum industry effluents. Washington: American Petroleum Institute, API.

Chicago

Knight Robert L, Kadlec Robert H, American Petroleum Institute API, Knight Robert L and Kadlec Robert H. 1998. The use of treatment wetlands for petroleum industry effluents. Washington: American Petroleum Institute, API.

Harvard

Knight R. L., Kadlec R. H., American Petroleum Institute A., Knight R. L. and Kadlec R. H. (1998). The use of treatment wetlands for petroleum industry effluents. Washington: American Petroleum Institute, API.

MLA

Knight Robert L, Kadlec Robert H, American Petroleum Institute API, Knight Robert L and Kadlec Robert H. The use of treatment wetlands for petroleum industry effluents. Washington: American Petroleum Institute, API. 1998.