NASH, W. A. (1999). Schaum's outline of theory and problems of strength of material.-- ed.4. McGraw-Hill.

NASH, William A. Schaum's Outline of Theory and Problems of Strength of Material.-- Ed.4. New York: McGraw-Hill, 1999.

NASH, William A. Schaum's Outline of Theory and Problems of Strength of Material.-- Ed.4. McGraw-Hill, 1999.