Beer, F. P., Johnston, E. R. 1., & DeWolf, J. T. (2002). Mechanics of materials: Interactive mechanics of materials tutorial (3rd ed.). New York: McGraw-Hill.

Beer, Ferdinand Pierre, E. Russell 1925- Johnston, و John T. DeWolf. Mechanics of Materials: Interactive Mechanics of Materials Tutorial. 3rd ed. New York: McGraw-Hill, 2002.

Beer, Ferdinand Pierre, E. Russell 1925- Johnston, و John T. DeWolf. Mechanics of Materials: Interactive Mechanics of Materials Tutorial. 3rd ed. New York: McGraw-Hill, 2002.