APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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