Pelfrey, William, author
American Management Association, 2006
eBooks
Demos, John
North Eastern University Press, 1991
Buku Teks
Chandler, Alfred D.
MIT Press, 1980
Buku Teks
Topham, Alfred F.
Stevens and Sons, Limited, 1933
Buku Teks
Deakin, Alfred
Robertson & Mullens, 1944
Buku Teks