Merkow, Mark S., author
[American Management Association, ], 2002
eBooks
Allen, Anita L., author
West, 2011
Buku Teks
editors, David A. Elizondo, Agusti Solanas, Antoni Martınez-Balleste
Springer, 2012
eBooks
Garfinkel, Simson, author
O`Reilly and Associates, 1995
Buku Teks
Niblett, G.B.F., author
OECD, 1971
Buku Teks