Gaya APA
Ugural, A, C. (1995).
(TEKNIK SIPIL 1) Advanced Strength And Appliead Elasticity (3).
United State of America:
Prentice- Hall.
Gaya MLA
Ugural, Ansel, C..
"(TEKNIK SIPIL 1) Advanced Strength And Appliead Elasticity".
3
United State of America:
Prentice- Hall,
1995.
.