Dessler, Gary, 1942-, author
Prentice-Hall, 2009
Buku Teks
Hadari Nawawi, author
Gadjah Mada University Press, 1998
Buku Teks
Hadari Nawawi, author
Gadjah Mada University Press, 2011
Buku Teks
Grensing-Phophal, Lin, author
Prenada, 2008
Buku Teks
Cushway, Barry
Elex Media Komputindo , 1999
Buku Teks