O`Shea, Tim, author
Harvester Press, 1983
Buku Teks
Timmins, Geoff, author
Sage, 2006
Buku Teks
by George E. Miller ... [et al.]
Harvard University Press, 1968
Buku Teks
Artikel Jurnal
editor by Anthony Tatlow
Hong Kong University Press, 1982
Buku Referensi