Gaya APA
LEGGET, R, F.
(1988).
GEOLOGY AND ENGINEERING: Third Edition
(
THIRD EDITION)
.
Singapore:
Mc Graw Hill.
Gaya MLA
LEGGET, ROBERT, F..
"GEOLOGY AND ENGINEERING: Third Edition".
THIRD EDITION
Singapore:
Mc Graw Hill,
1988.
Textbook.