Beer, F. P., Johnston, E. R. 1., & Johnston, E. R. (1976). Mechanics for engineers (3rd ed.). New York: McGraw-Hill.
Παραπομπή Chicago StyleBeer, Ferdinand Pierre, E. Russell 1925- Johnston, and E. Russell Johnston. Mechanics for Engineers. 3rd ed. New York: McGraw-Hill, 1976.
Παραπομπή MLABeer, Ferdinand Pierre, E. Russell 1925- Johnston, and E. Russell Johnston. Mechanics for Engineers. 3rd ed. New York: McGraw-Hill, 1976.
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