Cita APA (7th ed.)

DeVellis, R. F. (2003). Scale development: Theory and applications (2a. ed.). Sage.

Cita Chicago (17th ed.)

DeVellis, Robert F. Scale Development: Theory and Applications. 2a. ed. Thousand Oaks: Sage, 2003.

Cita MLA (9th ed.)

DeVellis, Robert F. Scale Development: Theory and Applications. 2a. ed. Sage, 2003.