Beer, F. P. 1., & Johnston, E. R. 1. (2000). New media version vector mechanics for engineers: Statics and dynamics : student resources (6th ed.). Boston: McGraw-Hill.

Beer, Ferdinand P. 1915., و E. Russell 1925- Johnston. New Media Version Vector Mechanics for Engineers: Statics and Dynamics : Student Resources. 6th ed. Boston: McGraw-Hill, 2000.

Beer, Ferdinand P. 1915., و E. Russell 1925- Johnston. New Media Version Vector Mechanics for Engineers: Statics and Dynamics : Student Resources. 6th ed. Boston: McGraw-Hill, 2000.