Gaya APA
Villaverde, R.
(2009).
(TEKNIK SIPIL 1) Fundamental Concepts of Earthquake Engineering
(
1)
.
Florida:
CRC press.
Gaya MLA
Villaverde, Roberto.
"(TEKNIK SIPIL 1) Fundamental Concepts of Earthquake Engineering".
1
Florida:
CRC press,
2009.
.