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Gaya APA
DeVellis, Robert F.. (2003).
Scale development : theory and applications .
:
Sage Publications.
Gaya Chicago
DeVellis, Robert F..
Scale development : theory and applications.
:
Sage Publications,
2003.
Book.
Gaya MLA
DeVellis, Robert F..
Scale development : theory and applications.
:
Sage Publications,
2003.
Book.
Gaya Turabian
DeVellis, Robert F..
Scale development : theory and applications.
:
Sage Publications,
2003.
Book.