Cooper, Donald R., author
Irwin/McGraw-Hill, 1998
Buku Teks
Cooper, Donald R., author
McGraw-Hill, 1998
Buku Teks
Ticehurst, George William, author
Longman, 2000
Buku Teks
Sekaran, Uma, author
John Wiley & Sons, 2016
Buku Teks
Sekaran, Uma, author
John Wiley & Sons, 2003
Buku Teks