Gaya APA
Whittaker, B. (1989).
SUBSIDENCE=PENURUNAN MUKA TANAH: Occurrence, Prediction and Control .
Amsterdam:
Elsevier.
Gaya MLA
Whittaker, B.N.
"SUBSIDENCE=PENURUNAN MUKA TANAH: Occurrence, Prediction and Control".
Amsterdam:
Elsevier,
1989.
Text.