Dyfyniad APA

(1940). Vol. 32, № 7; Industrial and Engineering Chemistry. Industrial Edition. 1940.

Dyfyniad Arddull Chicago

Vol. 32, № 7; Industrial and Engineering Chemistry. Industrial Edition. 1940, 1940.

Dyfyniad MLA

Vol. 32, № 7; Industrial and Engineering Chemistry. Industrial Edition. 1940, 1940.

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