APA

English G. L., . (1939). Descriptive list of the new minerals. New York: McGraw-Hill.

Chicago

English George Letchworth, . 1939. Descriptive list of the new minerals. New York: McGraw-Hill.

Harvard

English G. L., . (1939). Descriptive list of the new minerals. New York: McGraw-Hill.

MLA

English George Letchworth, . Descriptive list of the new minerals. New York: McGraw-Hill. 1939.