Graaf, H. J. d., Keurs, W. J. t., & Musters, C. J. M. (1999). Regional opportunities for sustainable development: Theory, methods, and applications. Kluwer Academic Publishers.
Citace podle Chicago (17th ed.)Graaf, H. J. de, W. J. ter Keurs, a C. J. M. Musters. Regional Opportunities for Sustainable Development: Theory, Methods, and Applications. Dordrecht ; Boston: Kluwer Academic Publishers, 1999.
Citace podle MLA (8th ed.)Graaf, H. J. de, et al. Regional Opportunities for Sustainable Development: Theory, Methods, and Applications. Kluwer Academic Publishers, 1999.
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