Kaufman, L., & Rousseeuw, P. J. (1990). Finding groups in data: An introduction to cluster analysis. Wiley.
Lua i Stíl Chicago (17ú heag.)Kaufman, Leonard, agus Peter J. Rousseeuw. Finding Groups in Data: An Introduction to Cluster Analysis. New York: Wiley, 1990.
Lua MLA (9ú heag.)Kaufman, Leonard, agus Peter J. Rousseeuw. Finding Groups in Data: An Introduction to Cluster Analysis. Wiley, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.