APA-viite

DeVellis, R. F. (2012). Scale development: Theory and applications/3e (3rd ed.). SAGE.

Chicago-tyylinen lähdeviittaus

DeVellis, Robert F. Scale Development: Theory and Applications/3e. 3rd ed. Thousand Oaks, Calif.: SAGE, 2012.

MLA-viite

DeVellis, Robert F. Scale Development: Theory and Applications/3e. 3rd ed. SAGE, 2012.