Hart, Andrew
Understanding the media : a practical guide
Routledge, 1997
 Buku Referensi
Thorn, Eric A.
Understanding copyright : a practical guide
Jay Books, 1989
 Buku Referensi
Thorn, Eric A.
Understanding copyright: a practical guide / Eric A. Thorn
Jay Books , 1989
 Buku Teks
Baron, Robert A.
Understanding human relations : a practical guide to people at work
Allyn and Bacon, 1991
 Buku Teks SO
Riso, Don Richard
Understanding the enneagram the practical guide to personality types
Houghton Mifflin, 2000
 Buku Teks SO