Gaya APA
Humphreys, K, K., Gladstone, J.
(1995).
Mechanical Estimating Guidebook
(
6)
.
Amerika:
McGraw-Hill.
Gaya MLA
Humphreys, Kenneth, K.., Gladstone, John.
"Mechanical Estimating Guidebook".
6
Amerika:
McGraw-Hill,
1995.
.