Παραπομπή σε μορφή APA (7η εκδ.)

Heilbroner, R. L. (1996). Visions of the future: The distant past, yesterday, today, tomorrow. New York Public Library : Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Heilbroner, Robert L. Visions of the Future: The Distant Past, Yesterday, Today, Tomorrow. New York: New York Public Library : Oxford University Press, 1996.

Παραπομπή σε μορφή MLA (9th εκδ.)

Heilbroner, Robert L. Visions of the Future: The Distant Past, Yesterday, Today, Tomorrow. New York Public Library : Oxford University Press, 1996.