Schechner, Richard, author
Routledge, 2013
Buku Teks
Bell, Richard
The Edinburgh University Press , 1953
Buku Teks
Page, Malcolm, author
Macmillan Education, 1987
Buku Teks
Roberts, Richard A., 1935-, author
Massachusetts Addison-Wesley, 1992
Buku Teks
Shultz, Richard D.
John Wiley & Sons, 1988
Buku Teks