Gaya APA
CLOUGH, R, W., PENZIEN, J. (1985).
dynamics of syructures (International Edition).
SINGAPURE:
Mc Graw Hill.
Gaya MLA
CLOUGH, RAY, W.., PENZIEN, JOSEPH.
"dynamics of syructures".
International Edition
SINGAPURE:
Mc Graw Hill,
1985.
Text Book Sipil.