.Petersen, J. L. (1994). The Road to 2015: Profiles of the future. Waite Group Press; [Publishers Group West [distributor.
Chicago-viite (17. p.).Petersen, John L. The Road to 2015: Profiles of the Future. Corte Madera, Calif. : Emeryville, CA: Waite Group Press; [Publishers Group West [distributor, 1994.
MLA-viite (9. p.).Petersen, John L. The Road to 2015: Profiles of the Future. Waite Group Press; [Publishers Group West [distributor, 1994.
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