Gaya APA
GRAY, W, S., MANNING, G, ., P. (1973).
CONCRETE WATER TOWERS BUNKERS SILOS & OTHER ELEVATED STRUCTURES, FIFTH EDITION (ED. 5).
LONDON:
CEMENT AND CONCRETE ASSOCIATION.
Gaya MLA
GRAY, W., S.., MANNING, G, ., P..
"CONCRETE WATER TOWERS BUNKERS SILOS & OTHER ELEVATED STRUCTURES, FIFTH EDITION".
ED. 5
LONDON:
CEMENT AND CONCRETE ASSOCIATION,
1973.
Prodi S1 Teknik Sipil.