Bradt, A. Gordon, author
Parker, 1973
Buku Teks
Podolinsky, Michael A, author
McGraw-Hill, 2013
Buku Teks
Pearson, Barrie, author
Mercurry, 1991
Buku Teks
Cascio, Wayne F., author
McGraw-Hill, 1989
Buku Teks
Cascio, Wayne F., author
McGraw-Hill/Irwin, 2003
Buku Teks