Dyfyniad APA

Weeks, M. E. (1956). Discovery of the elements (1956) (6th. ed.). Journal of Chemical Education.

Dyfyniad Arddull Chicago

Weeks, Mary Elvira. Discovery of the Elements (1956). 6th. ed. Easton, Pa: Journal of Chemical Education, 1956.

Dyfyniad MLA

Weeks, Mary Elvira. Discovery of the Elements (1956). 6th. ed. Journal of Chemical Education, 1956.

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