Waelder, R. (1967). Progress and revolution: A study of the issues of our age. International Universities Press.
Chicago-referens (17:e uppl.)Waelder, Robert. Progress and Revolution: A Study of the Issues of Our Age. New York: International Universities Press, 1967.
MLA-referens (9:e uppl.)Waelder, Robert. Progress and Revolution: A Study of the Issues of Our Age. International Universities Press, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.