Aveling, Harry, author
Faculty of Humanities University of Indonesia, 2006
Artikel Jurnal
La Rose (Laloan, Jenny Marcelina), author
Alam Budaya, 1990
Buku Teks
Schneider, Susan C., author
Prentice-Hall, 1997
Buku Teks
Gillespie, Sheena, author
Allyn and Bacon , 1994
Buku Teks
edited by Chibueze C. Udeani ... [et al.]
Council for Research in Values and Philosophy,, 2006
Buku Teks