APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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