Gaya APA
Peurifoy, R, L., Ledbetter, W, B. (1985).
Constrution Planning, Equipment & Methods (4).
New York:
McGraw - Hill.
Gaya MLA
Peurifoy, Robert, L.., Ledbetter, William, B..
"Constrution Planning, Equipment & Methods".
4
New York:
McGraw - Hill,
1985.
Text.