A Laurel Original, 1977
Buku Teks
edited by Hening Cohen
Basic Books, 1969
Buku Teks
Gray, Richard, 1944-, author
John Wiley & Sons, 2015
Buku Teks
Weales, Gerald Clifford, 1925-, author
Macmillan, 1969
Buku Teks
Conner, Fredeick William
University of Florida Press, 1949
Buku Teks