Gaya APA
DR.B.C.Punmia, . (1981).
Strength of Materials and Mechanics of Structures (6).
New delhi:
Standard Publishers Distributors.
Gaya MLA
DR.B.C.Punmia, .
"Strength of Materials and Mechanics of Structures".
6
New delhi:
Standard Publishers Distributors,
1981.
Text.