Pengaruh flexitime terhadap kinerja dengan work-life balance sebagai variabel intervening: studi pada karyawan Kantor Pusat PT. Pertamina persero Direktorat Sumber Daya Manusia = The effect of flexitime on performance with work life balance as an intervening variable: a study on head office employees at PT. Pertamina persero Directorate of Human Resources

Improving supervisory performance / Lester R. Bittel.

Personnel leadership in industry / David R. Craig and W.W. Charters

How to manage people at work : a short course for professionals / O. Jeff Harris

Labor and monopoly capital : the degradation of work in the twentieth century