Kumpulan Daftar Isi Buku 300.702 COZ m (RS) Methods in... : Measurement concepts, ( Ket. lihat bab. 5 ) ( halaman 91-108 ) Cozby, Paul C. Behavioral Scientist - Methods Psychological Research Personnel Boston: McGraw Hill Higher Education, 2005 https://lib.fkm.ui.ac.id:443/detail?id=112835