APA

Koestler A., . (1953). The age of longing. New York: The new americanlibrary.

Chicago

Koestler Arthur, . 1953. The age of longing. New York: The new americanlibrary.

Harvard

Koestler A., . (1953). The age of longing. New York: The new americanlibrary.

MLA

Koestler Arthur, . The age of longing. New York: The new americanlibrary. 1953.