Beer, Francis A
Halt, Rinehart, 1970
Buku Teks
Buku Teks
edited by Robert W. Tucker, Charles B. Keely and Linda Wrigley
Westview Press, 1992
Buku Teks
Jordan, Amos A.
Praeger, 1962
Buku Teks
by Marise Cremona ... [and others]
Cambrigde University Press , 2015
Buku Teks