University of Notre Dame Press, 1979
Buku Teks
Wesson, Robert G.
Houghton mifflin, 1977
Buku Teks
Thompson, Kenneth W.
Lousiana State University Press, 1980
Buku Teks
edited by Stephen Clarkson
The Canadian, 1968
Buku Teks
University of British Columbia Press, 1982
Buku Teks