Zimmer, Heinrich, author
Meridian Books, 1956
Buku Teks
Roveda, Vittorio
River Books Press, 2013
Multimedia
Raju, P.T.
George Allen and Unwin, 1953
Buku Teks
edited by Katie Scott and Deborah Cherry
Blackwell Publishing, 2005
Buku Teks
Riley, Noel, editor
Free Press, 2003
Buku Referensi