Hopper, V. F. (1938). Medieval Number Symbolism: Its Sources, Meaning, and Influence on Thought and Expression. Columbia University Press. https://doi.org/10.7312/hopp91968
Chicago-Zitierstil (17. Ausg.)Hopper, Vincent Foster. Medieval Number Symbolism: Its Sources, Meaning, and Influence on Thought and Expression. New York, NY: Columbia University Press, 1938. https://doi.org/10.7312/hopp91968.
MLA-Zitierstil (9. Ausg.)Hopper, Vincent Foster. Medieval Number Symbolism: Its Sources, Meaning, and Influence on Thought and Expression. Columbia University Press, 1938. https://doi.org/10.7312/hopp91968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.