Cohen, William A., author
American Management Association, 2008
eBooks
Deverell, C.S., author
London, Gee & Co
Buku Teks
Dailey, Charles Alvin, 1923-, author
Parker, 1970
Buku Teks
McCarthy, John Joseph, 1909-2005, author
McGraw-Hill, 1978
Buku Teks
Johnson, Rossal James, author
Richard D. Irwin, 1960
Buku Teks