Tooley, Peter
Fats, oils and waxes / Peter Tooley
John Murray, 1971
Buku Teks SO
Travel behaviour research the leading edge
David Hensher
Pergamon Press, 2001
Buku Teks
SEG Annual report : The leading edge
Tahunan
Majalah, Jurnal, Buletin
Kotter, John P., 1947-
Leading change
Harvard Business School, 1996
Buku Teks
Customer services in the National Library of Australia: leading edge or dragging the chain?
Artikel Jurnal