Gaya APA

Swanson, C, P., Punmia, B. (NULL). Strenght of materials and mechanics of structures volume I . New: New Delhi: Standard; 1991.

Gaya MLA

Swanson, Carl, P.., Punmia, B.C.. "Strenght of materials and mechanics of structures volume I". New: New Delhi: Standard; 1991, NULL. Text.