Tooley, Peter
Fats, oils and waxes / Peter Tooley
John Murray, 1971
Buku Teks SO
SEG Annual report : The leading edge
Tahunan
Majalah, Jurnal, Buletin
Travel behaviour research the leading edge
David Hensher
Pergamon Press, 2001
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Travel behaviour research the leading edge
David Hensher
Pergamon Press, 2001
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Kotter, John P., 1947-
Leading change
Harvard Business School, 1996
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