Dyfyniad APA

Szekely, J. (1973). The steel industry and the environment. New York: Marcel Dekker, Inc.

Dyfyniad Arddull Chicago

Szekely, Julian. The Steel Industry and the Environment. New York: Marcel Dekker, Inc, 1973.

Dyfyniad MLA

Szekely, Julian. The Steel Industry and the Environment. New York: Marcel Dekker, Inc, 1973.

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