Gaya APA
Wichern, R., A., J., &., D., W. (2007).
APPLIED MULTIVARIATE STATISTIC ANALYSIS SIXTH EDITION (sixth Edition).
New Jersy:
Pearson Education .
Gaya MLA
Wichern, Richard, A., Johnson, &, Dean, W..
"APPLIED MULTIVARIATE STATISTIC ANALYSIS SIXTH EDITION".
sixth Edition
New Jersy:
Pearson Education ,
2007.
Buku Inti.