edited by Mieke Ball
California Stanford University Press, 1999
Buku Teks
Artikel Jurnal
Nicholas Freudenberg, Susan Klitzman, Susan Saegert, editor
Jossey- Bass, 2009
Buku Teks
Richterich, Rene, author
John Wiley & Sons, 1978
Buku Teks
Artikel Jurnal