APA

Hellman Hal, . (1970). The city in the world of the future. New York: Dellpublishing.

Chicago

Hellman Hal, . 1970. The city in the world of the future. New York: Dellpublishing.

Harvard

Hellman Hal, . (1970). The city in the world of the future. New York: Dellpublishing.

MLA

Hellman Hal, . The city in the world of the future. New York: Dellpublishing. 1970.