Program intervensi untuk meningkatkan work engagement pada PT. XYZ berdasarkan variabel work meaningfulness, optimism, dan self esteem = Intervention program to improve work engagement at PT. XYZ based on work meaningfulness, optimism, and self-esteem variable / Nurul Margi Astuti - Nurul Margi Astuti, author (Fakultas Psikologi Universitas Indonesia, 2013)