Clifford, H. T., Stephenson, W., & Stephenson, W. (1975). An introduction to numerical classification. New York: Academic Press.
Παραπομπή Chicago StyleClifford, H. T., William Stephenson, and W. Stephenson. An Introduction to Numerical Classification. New York: Academic Press, 1975.
Παραπομπή MLAClifford, H. T., William Stephenson, and W. Stephenson. An Introduction to Numerical Classification. New York: Academic Press, 1975.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.