APA (7th ed.) Citation

Heard, G. (1963). The five ages of man: The psychology of human history. Julian Press.

Chicago Style (17th ed.) Citation

Heard, Gerald. The Five Ages of Man: The Psychology of Human History. New York: Julian Press, 1963.

MLA (9th ed.) Citation

Heard, Gerald. The Five Ages of Man: The Psychology of Human History. Julian Press, 1963.