APA

Darwin C., Darwin F., . (1959). The life and letters of Charles Darwin. New York: Basic Books, Inc.

Chicago

Darwin Charles, Darwin Francis, . 1959. The life and letters of Charles Darwin. New York: Basic Books, Inc.

Harvard

Darwin C., Darwin F., . (1959). The life and letters of Charles Darwin. New York: Basic Books, Inc.

MLA

Darwin Charles, Darwin Francis, . The life and letters of Charles Darwin. New York: Basic Books, Inc. 1959.