Gaya APA
Malenbaum, W.
(1978).
World Demand for Raw Materials in 1985 and 2000
.
New York:
McGraw - Hill.
Gaya MLA
Malenbaum, Wilfred.
"World Demand for Raw Materials in 1985 and 2000".
New York:
McGraw - Hill,
1978.
Text.