APA aipamena

De Vellis, R. F. (2012). Scale development: Theory and applications (3rd ed.). Sage.

Chicago Style aipamena

De Vellis, Robert F. Scale Development: Theory and Applications. 3rd ed. Los Angeles: Sage, 2012.

MLA aipamena

De Vellis, Robert F. Scale Development: Theory and Applications. 3rd ed. Sage, 2012.