Gaya APA
Devellis, Robert F.. (2017).
Scale Development: Theory and Applications (Ed.4.).
Los Angeles:
Sage.
Gaya Chicago
Devellis, Robert F..
Scale Development: Theory and Applications.
Ed.4.
Los Angeles:
Sage,
2017.
Text.
Gaya MLA
Devellis, Robert F..
Scale Development: Theory and Applications.
Ed.4.
Los Angeles:
Sage,
2017.
Text.
Gaya Turabian
Devellis, Robert F..
Scale Development: Theory and Applications.
Ed.4.
Los Angeles:
Sage,
2017.
Print.