William, Miller, author
American Management Association, 2005
eBooks
Axelrod, Wendy, author
Berrett Koehler, 2011
Buku Teks
Oshaug, A.
WHO, 1993
Buku Referensi
Elliott, Donald S., author
[American Library association, American Library association], 2007
eBooks
Friedmann, Julian, author
Intellect, 2000
Buku Teks