edited by Blaise W. Liffick
McGraw-Hill, 1978
Buku Teks
Liffick, Blaise W., author
McGraw-Hill, 1984
Buku Teks
Sinclair, Joseph T., author
American Management Association, 2005
eBooks
William Kaufmann, 1982
Buku Teks
Turin, George L., author
Van Nostrand Reinhold, 1969
Buku Teks