Centre for International Research on Economic Tendency Surveys & Strigel, W. H. (1978). Problems and instruments of business cycle analysis: A selection of papers presented at the 13th CIRET conference ; proceedings, Munich, 1977. Springer-Verlag.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Centre for International Research on Economic Tendency Surveys و Werner H. Strigel. Problems and Instruments of Business Cycle Analysis: A Selection of Papers Presented at the 13th CIRET Conference ; Proceedings, Munich, 1977. Berlin ; New York: Springer-Verlag, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Centre for International Research on Economic Tendency Surveys و Werner H. Strigel. Problems and Instruments of Business Cycle Analysis: A Selection of Papers Presented at the 13th CIRET Conference ; Proceedings, Munich, 1977. Springer-Verlag, 1978.