Kirberger, Kimberly, author
Gramedia, 2004
Buku Teks
Sedarmayanti, author
CV. Mandar Maju, 2005
Buku Teks
editor, Djoni Edward
Gagas Bisnis, 2009
Buku Teks
Haikio, Martti, author
Ufuk Press, 2008
Buku Teks
Secrefan, Lance, author
Gramedia, 1988
Buku Teks