Kautsky, K. (1972). Foundations of Christianity: A study in Christian origins. Monthly Review Press.
Chicago-referens (17:e uppl.)Kautsky, Karl. Foundations of Christianity: A Study in Christian Origins. New York: Monthly Review Press, 1972.
MLA-referens (9:e uppl.)Kautsky, Karl. Foundations of Christianity: A Study in Christian Origins. Monthly Review Press, 1972.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.