Gaya APA

L.Peurifoy, R., Ledbetter, W, B. (1985). Construction Planning, Equipment,and methods (4). New York: McGraw Hill Book Co.

Gaya MLA

L.Peurifoy, Robert., Ledbetter, William, B.. "Construction Planning, Equipment,and methods". 4 New York: McGraw Hill Book Co, 1985. Text.