(1981). The joint struggle of the working-class movement and the national liberation movement against imperialism and for social progress: International Scientific Conference, Berlin, 20-24 October 1980. Verlag Zeit im Bild.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)The Joint Struggle of the Working-class Movement and the National Liberation Movement Against Imperialism and for Social Progress: International Scientific Conference, Berlin, 20-24 October 1980. Dresden: Verlag Zeit im Bild, 1981.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)The Joint Struggle of the Working-class Movement and the National Liberation Movement Against Imperialism and for Social Progress: International Scientific Conference, Berlin, 20-24 October 1980. Verlag Zeit im Bild, 1981.
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