APA

Middleton D., . (1960). The sky suspended. New York: Longmans, Green.

Chicago

Middleton Drew, . 1960. The sky suspended. New York: Longmans, Green.

Harvard

Middleton D., . (1960). The sky suspended. New York: Longmans, Green.

MLA

Middleton Drew, . The sky suspended. New York: Longmans, Green. 1960.