Conference on Urbanisation and Environment (1972 : Lyngby, Denmark), International Economic Association, Heggie, I. G., & Rothenberg, J. (1974). The management of water quality and the environment: Proceedings of a conference held by the International Economic Association at Lyngby, Denmark. Macmillan.
Cita Chicago (17th ed.)Conference on Urbanisation and Environment (1972 : Lyngby, Denmark), International Economic Association, Ian Graeme Heggie, i Jerome Rothenberg. The Management of Water Quality and the Environment: Proceedings of a Conference Held by the International Economic Association at Lyngby, Denmark. London: Macmillan, 1974.
Cita MLA (9th ed.)Conference on Urbanisation and Environment (1972 : Lyngby, Denmark), et al. The Management of Water Quality and the Environment: Proceedings of a Conference Held by the International Economic Association at Lyngby, Denmark. Macmillan, 1974.