Spiegel, M. R. (1971). Schaum's outline of theory and problems of calculus of finite differences and difference equations (23.).
Chicago-стиль цитированияSpiegel, Murray R. Schaum's Outline of Theory and Problems of Calculus of Finite Differences and Difference Equations. 23. McGraw-Hill book Co, Inc, New York, 1971.
MLA-цитированиеSpiegel, Murray R. Schaum's Outline of Theory and Problems of Calculus of Finite Differences and Difference Equations. 23. 1971.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.