APA

Heilbroner R. L., . (1960). The future as history : The historic currents of our time and the direction in which they are taking America. New York: Grove Press.

Chicago

Heilbroner Robert L, . 1960. The future as history : The historic currents of our time and the direction in which they are taking America. New York: Grove Press.

Harvard

Heilbroner R. L., . (1960). The future as history : The historic currents of our time and the direction in which they are taking America. New York: Grove Press.

MLA

Heilbroner Robert L, . The future as history : The historic currents of our time and the direction in which they are taking America. New York: Grove Press. 1960.