Dyfyniad APA

Malenbaum, W. (1978). World demand for raw materials in 1885 and 2000. E/MJ Mining Informational Services, McGraw-Hill, Inc.

Dyfyniad Arddull Chicago

Malenbaum, Welfred. World Demand for Raw Materials in 1885 and 2000. New York: E/MJ Mining Informational Services, McGraw-Hill, Inc, 1978.

Dyfyniad MLA

Malenbaum, Welfred. World Demand for Raw Materials in 1885 and 2000. E/MJ Mining Informational Services, McGraw-Hill, Inc, 1978.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.