Moriarty, Sandra E. (Sandra Ernst), author
Prentice Hall International, 1991
Buku Teks
Burton, Philip Ward, 1910-, author
Grid Publishing, 1978
Buku Teks
Burton, Philip Ward, 1910-, author
NTC Business Book, 1991
Buku Teks
Hotchkiss, George Burton, author
Macmillan, 1950
Buku Teks
Hotchkiss, George Burton, author
Alexander Hamilton Institute , 1961
Buku Teks