need joki e-book, drop PL nya yaak
Holbrook, A., & Bourke, S. (2005). Introduction to Research Methodology. Newcastle
Australia.
Arnold, W. E., McCroskey, J. C., & Prichard, S. V. O. (1967). The Likert‐type scale. Today’s Speech, 15(2), 31–33.
https://t.co/xdH7YMtes2.
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