Magee, John F., author
McGraw-Hill, 1958
Buku Teks
Bethel, Lawrence L., author
McGraw-Hill, 1948
Buku Teks
British Institute of Management , 1951
Buku Teks
Bedworth, David D., author
John Wiley & Sons, 1987
Buku Teks
Bedworth, David D., author
John Wiley & Sons, 1987
Buku Teks