Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

DeVellis, Robert F. Scale Development: Theory and Applications. Newbury Park [etc.]: Sage, 1991.

Cita MLA (9a ed.)

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