Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper, 1990
Buku Teks
Wolf, Thomas, author
A fireside Book, 1990
Buku Teks
Shepherd, Elizabeth J., 1960-, author
London, Facet
Buku Referensi
Shepherd, Elizabeth J., 1960-, author
Facet Publishing, 2003
Buku Referensi
Shepherd, Ellizabeth, author
Facet, 2003
Buku Teks