Beer, F. P., & Johnston, E. R. (2002). Vector mechanics for engineers: :statics (3rd SI metric ed.). Tata McGraw-Hill Publishing Co. Ltd.

Beer, Ferdinand P., and E Russell Johnston. Vector Mechanics for Engineers: :statics. 3rd SI metric ed. N.Delhi: Tata McGraw-Hill Publishing Co. Ltd, 2002.

Beer, Ferdinand P., and E Russell Johnston. Vector Mechanics for Engineers: :statics. 3rd SI metric ed. Tata McGraw-Hill Publishing Co. Ltd, 2002.