Aldenderfer, M. S., & Blashfield, R. K. (1984). Cluster analysis. Sage.
Lua i Stíl Chicago (17ú heag.)Aldenderfer, Mark S., agus Roger K. Blashfield. Cluster Analysis. Newbury Park, Calif: Sage, 1984.
Lua MLA (9ú heag.)Aldenderfer, Mark S., agus Roger K. Blashfield. Cluster Analysis. Sage, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.