APA ציטוט

DeVellis, R. F. (1991). Scale development: Theory and applications. Sage.

Chicago Style (17th ed.) Citation

DeVellis, Robert F. Scale Development: Theory and Applications. Newbury Park, Calif.: Sage, 1991.

ציטוט MLA

DeVellis, Robert F. Scale Development: Theory and Applications. Sage, 1991.