Hartley, Hazel J., author
Cavendish Publishing Limited, 2001
Buku Teks
edited by Judy L. Van Raalte, Britton W. Brewer
American Psychological Association, 2002
Buku Teks
Yonathan L.M., author
Fakultas Hukum Universitas Indonesia, 2013
UI - Skripsi (Membership)
StuĂrzebecher, Peter, author
Wiley-Academy, 2002
Buku Teks
Sturzebecher, Peter
Wiley-Academy, 2002
Buku Teks