Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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