Abrahamsen, G. (1981). Beyond the energy crisis. Opportunity and challenge. Vol. 2: 3rd internat. conf. on energy use management, Berlin(West), Oct. 26 - 30, 1981. Pergamon Press.
Citace podle Chicago (17th ed.)Abrahamsen, G. Beyond the Energy Crisis. Opportunity and Challenge. Vol. 2: 3rd Internat. Conf. on Energy Use Management, Berlin(West), Oct. 26 - 30, 1981. Oxford: Pergamon Press, 1981.
Citace podle MLA (9th ed.)Abrahamsen, G. Beyond the Energy Crisis. Opportunity and Challenge. Vol. 2: 3rd Internat. Conf. on Energy Use Management, Berlin(West), Oct. 26 - 30, 1981. Pergamon Press, 1981.
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