Iacone, Salvatore J., author
Macmillan, 1985
Buku Teks
Netzley, Michael, author
Prentice-Hall, 2001
Buku Teks
Lesikar, Raymond V. (Raymond Vincent), author
Dow Jones-Irwin , 1974
Buku Teks
Sklare, Arnold B., author
McGraw-Hill, 1964
Buku Teks
Waldo, Willis H., author
Van Nostrand Reinhold, 1960
Koleksi Publik