Gaya APA
Excavation Systems Planning, Design, and Safety. (2009).
New York:
The McGraw-Hill Companies.
Gaya Chicago
Excavation Systems Planning, Design, and Safety.
.
New York:
The McGraw-Hill Companies,
2009.
.
Gaya MLA
Excavation Systems Planning, Design, and Safety.
.
New York:
The McGraw-Hill Companies,
2009.
.
Gaya Turabian
Excavation Systems Planning, Design, and Safety.
New York:
The McGraw-Hill Companies,
2009.
.