APA

Belcher J. E., Colbert J. C., . (1940). Properties and numerical relationships of the common elements and compounds. New York: D.Appleton.

Chicago

Belcher J E, Colbert J C, . 1940. Properties and numerical relationships of the common elements and compounds. New York: D.Appleton.

Harvard

Belcher J. E., Colbert J. C., . (1940). Properties and numerical relationships of the common elements and compounds. New York: D.Appleton.

MLA

Belcher J E, Colbert J C, . Properties and numerical relationships of the common elements and compounds. New York: D.Appleton. 1940.