Gaya APA

DeVellis, Robert F.. (1991). Scale Development : theory and applications . : Saga Publications.

Gaya Chicago

DeVellis, Robert F.. Scale Development : theory and applications. : Saga Publications, 1991. Book.

Gaya MLA

DeVellis, Robert F.. Scale Development : theory and applications. : Saga Publications, 1991. Book.

Gaya Turabian

DeVellis, Robert F.. Scale Development : theory and applications. : Saga Publications, 1991. Book.