Baron, Robert A.
Understanding human relations : a practical guide to people at work
Allyn and Bacon, 1991
 Buku Teks
Harborne, J.B.
Introduction to ecological biochemistry
Academic Press Limited, 1993
 Buku Teks
Civil Religion, Human Rights and International Relations: Connecting People Across Cultures and Traditions
Helle Porsdam, editor
Edward Elgar, 2012
 Buku Teks
Onong Uchjana Effendy
Human Relations dan Public Relations
Mandar Maju, 1993
 Buku Teks
Onong Uchjana Effendy
Human Relations dan Public Relations
Mandar Maju, 1993
 Buku Teks