Lewis, James P.
McGraw-Hill, 2007
Buku Teks
Lewis, James P.
McGraw-Hill, 1995
Buku Referensi
Kerzner, Harold R., author
Van Norstrand Reinhold, 1989
Buku Teks
Kerzner, Harold R., author
Van Nostrand Reinhold, 1995
Buku Teks
Kerzner, Harold R., author
John Wiley & Sons, 2006
Buku Teks