BEER, F. P., & JOHNSTON, E. R. (1992). Mechanics of materials.-- Ed.2. McGraw-Hill Book.

BEER, Ferdinand P., and E. Russell JOHNSTON. Mechanics of Materials.-- Ed.2. London: McGraw-Hill Book, 1992.

BEER, Ferdinand P., and E. Russell JOHNSTON. Mechanics of Materials.-- Ed.2. McGraw-Hill Book, 1992.