MITI , 1996
Buku Teks
Rosenthal, Morris S., author
McGraw-Hill , 1950
Buku Teks
prepared by Michael Gorman
[American Library Association, ], 2004
eBooks
International Chambar of Commerce; diterjemahkan olah Herry Hykmanto, Ramlan Ginting, M. Hari Siswanto
ICC Indonesia, 2007
Buku Teks
Hoyt, Edwin C.
Martinus Nijhoff , 1959
Buku Teks