APA

Bonn J. L., . (1940). So falls the elm tree. New York: Macmillan co.

Chicago

Bonn John Louis, . 1940. So falls the elm tree. New York: Macmillan co.

Harvard

Bonn J. L., . (1940). So falls the elm tree. New York: Macmillan co.

MLA

Bonn John Louis, . So falls the elm tree. New York: Macmillan co. 1940.