Murphy, Craig, author
West View Press, 1984
Buku Teks
edited by Marc-David L. Seidel, Henrich R. Greve
Emerald, 2017
eBooks
Hawkes, David, 1964-, author
Routledge, 1996
Buku Teks
Ullmann-Margalit, Edna
Clarendon Press, 1977
Buku Teks
Pfeiffer, John E., author
Harper & Row, 1969
Buku Teks