Linstone, H. A., Simmonds, W. H. C., & Bäckstrand, G. (1977). Futures research: New directions. Addison-Wesley Pub. Co., Advanced Book Program.
Chicago-čujuhus (17. p.)Linstone, Harold A., Walter Henry Clive Simmonds, juo Göran Bäckstrand. Futures Research: New Directions. Reading, Mass.: Addison-Wesley Pub. Co., Advanced Book Program, 1977.
MLA-čujuhus (9. p.)Linstone, Harold A., et al. Futures Research: New Directions. Addison-Wesley Pub. Co., Advanced Book Program, 1977.
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