Johnson, Ross H.
Quantitative methods for management
Houghton Miffiln, 1976
Buku Teks
Cooper, Donald R.
Business research methods
McGraw-Hill, 2006
Buku Teks
Cooper, Donald R.
Business research methods
Irwin/McGraw-Hill, 1998
Buku Teks
Cooper, Donald R.
Business research methods
McGraw-Hill, 1998
Buku Teks
Cooper, Donald R.
Business research methods
McGraw-Hill, 2001
Buku Teks