Kaleck, M. (1969). Studies in the Theory of Business Cycles 1933-1939. Polish scientific publishers.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিKaleck, Michal. Studies in the Theory of Business Cycles 1933-1939. Poland: Polish scientific publishers, 1969.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিKaleck, Michal. Studies in the Theory of Business Cycles 1933-1939. Polish scientific publishers, 1969.