Korelasi antara kolektivisme kelompok dan komitmen perubahan pada karyawan dua perusahaan BUMN di bidang energi = A correlation between in group collectivism and commitment to change among two energy sector state owned companies employees / Dianinoer Tamatalo Putri ([Fakultas Psikologi Universitas Indonesia, Fakultas Psikologi Universitas Indonesia], 2014)