International Colloquium on Methodology of Sciences Warszawa. (1965). The foundation of statements and decisions: Proceedings of the International Colloquium on Methodology of Sciences held in Warsaw, 18-23 September 1961. PWN-Polish Scientific Publishers.
Chicago-Zitierstil (17. Ausg.)International Colloquium on Methodology of Sciences Warszawa. The Foundation of Statements and Decisions: Proceedings of the International Colloquium on Methodology of Sciences Held in Warsaw, 18-23 September 1961. Warszawa: PWN-Polish Scientific Publishers, 1965.
MLA-Zitierstil (9. Ausg.)International Colloquium on Methodology of Sciences Warszawa. The Foundation of Statements and Decisions: Proceedings of the International Colloquium on Methodology of Sciences Held in Warsaw, 18-23 September 1961. PWN-Polish Scientific Publishers, 1965.