European Cooperative Programme on Conservation and Exchange of Crop Genetic Resources. Working Group on Barley. Meeting & International Board for Plant Genetic Resources. (1989). Report of a Working Group on Barley (third meeting): Held at the Zentralinstitut fur Genetik und Kulturpflanzenforschung (ZIGuK), Gatersleben, GDR, 18-20 April 1989. IBPGR.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)European Cooperative Programme on Conservation and Exchange of Crop Genetic Resources. Working Group on Barley. Meeting و International Board for Plant Genetic Resources. Report of a Working Group on Barley (third Meeting): Held at the Zentralinstitut Fur Genetik Und Kulturpflanzenforschung (ZIGuK), Gatersleben, GDR, 18-20 April 1989. Rome: IBPGR, 1989.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)European Cooperative Programme on Conservation and Exchange of Crop Genetic Resources. Working Group on Barley. Meeting و International Board for Plant Genetic Resources. Report of a Working Group on Barley (third Meeting): Held at the Zentralinstitut Fur Genetik Und Kulturpflanzenforschung (ZIGuK), Gatersleben, GDR, 18-20 April 1989. IBPGR, 1989.