edited by J. Graham Beaumont
Grange Books, 1989
Buku Referensi
Alvi Syahrin
Alvi Ardhi Publishing, 2024
Buku Teks SO
Turner, Natasha
Rodale, 2010
Buku Teks SO
Mattone, John
[American Management Association, ], 2013
eBooks
Cousin, Pierre Jean
Alhambra House, 1999
Buku Teks SO